How to Evaluate Dried Fruit Samples: 10-Point Quality Checklist

Key takeaways

• A structured 10-point quality checklist transforms sample evaluation from subjective opinion into a repeatable, auditable process that protects your supply chain from costly lot failures.
• Moisture content and water activity are the two most predictive parameters for dried fruit shelf life — testing both catches problems that either measurement alone would miss.
• A 100-point supplier scoring matrix weighted across visual, analytical, sensory, and documentation criteria lets you compare suppliers on an objective, apples-to-apples basis and justify procurement decisions to stakeholders.
• Counter-sample retention is non-negotiable: without a sealed reference portion stored under controlled conditions, you have no recourse if a commercial lot deviates from the approved sample.
• The entire evaluation workflow — from sample receipt to approve/reject decision — can be completed in 48 hours with basic laboratory equipment, making thorough evaluation practical even under tight sourcing timelines.

Introduction

Learning how to evaluate dried fruit quality samples is the single highest-leverage skill a B2B procurement team can develop. A 200-gram sample that arrives at your lab represents a potential 20-tonne container commitment, a six-figure purchase order, and your brand's reputation at the retail shelf or in the formulation plant. Getting the evaluation wrong at the sample stage is not a minor inconvenience — it is the root cause of border rejections, production stoppages, customer complaints, and the slow erosion of margin that comes from accepting "good enough" quality instead of demanding specification compliance.

Yet sample evaluation remains one of the most inconsistently executed steps in dried fruit procurement. Many buying teams rely on a quick visual inspection and a taste test, sign off on the sample, and discover the problems only when the first commercial container arrives and fails QC at port. The gap between what the sample promised and what the container delivers is almost always traceable to an evaluation protocol that was too narrow, too informal, or too focused on sensory impression at the expense of analytical data.

This guide provides a complete, field-tested 10-point quality checklist for evaluating dried fruit samples — figs, apricots, raisins, sultanas, cherries, mulberries, and other categories sourced at B2B volumes. Each checkpoint includes the specific parameter to measure, the instrument or method required, the acceptable range by product, and the decision rule that determines whether the sample advances or stops. The checklist is designed to work for a procurement team evaluating samples in-house with standard lab equipment, supplemented by third-party laboratory testing where analytical precision matters. If you are sourcing Turkish dried fruit for the first time, start with our wholesale dried fruit sourcing guide for market context, then return here for the sample evaluation protocol.

For background on how to structure the sample request itself — quantities, RFQ documentation, chain of custody — see the B2B sample order best practices guide. This guide picks up where that one leaves off: the sample has arrived, the seal is intact, and the evaluation begins.

Why sample evaluation is your highest-ROI quality investment

Cost of a bad lot vs cost of thorough evaluation

The economics of sample evaluation are asymmetric in your favour. A complete in-house evaluation of a dried fruit sample — visual inspection, moisture testing, water activity measurement, sensory panel, defect count, documentation review — costs approximately USD 150-400 in labour and consumables, plus USD 300-700 for third-party laboratory confirmation if you send to an accredited lab. Call it USD 500-1,100 total for a rigorous evaluation.

Compare that to the cost of a failed commercial lot:

• Port rejection (EU RASFF alert): Direct cost of return or destruction plus shipping, typically USD 8,000-25,000 for a 20ft container. Indirect cost: your company name appears on the RASFF database, visible to every EU food safety authority and your competitors.
• Production stoppage: If the lot reaches your facility and fails incoming QC, production downtime while you source replacement material costs USD 2,000-15,000 per day depending on your throughput.
• Customer complaint or recall: If defective material reaches your customer, the cost escalates to product retrieval, brand damage, and potential regulatory action. A single recall event can exceed USD 100,000 in direct costs alone.
• Margin erosion from grade substitution: The subtlest damage. If you accept a sample without rigorous grading verification, the supplier learns that your specification is soft. Over time, the average quality of your shipments drifts downward while pricing stays constant — you lose margin silently.

The ratio is clear: USD 500-1,100 in evaluation cost protects against USD 8,000-100,000+ in failure cost. No other quality investment in your supply chain delivers a comparable return.

The 80/20 rule — what catches 80% of problems

Not every checkpoint on the list carries equal weight. Data from dried fruit import rejections across EU, US, and GCC markets consistently shows that four categories account for roughly 80% of quality failures:

1. Moisture content above specification — drives mould growth, accelerated spoilage, and weight manipulation (water is cheaper than fruit).
2. Aflatoxin or mycotoxin contamination — the single most common cause of EU border rejections for Turkish dried figs and apricots. See our aflatoxin and mycotoxin limits guide for regulatory thresholds by market.
3. Defect count above grade tolerance — insect damage, mould spots, foreign matter, mechanical damage. Grade substitution (delivering Grade 2 against a Grade 1 specification) is the most frequent commercial dispute in dried fruit trade.
4. Documentation mismatch — the CoA does not match the lot, the certificate is expired, or the phytosanitary certificate is missing. Learn how to read and verify a CoA in our quality testing and CoA guide.

A checklist that addresses these four areas rigorously will catch the majority of problems. The remaining six checkpoints on the list below address the 20% of failures that are less common but still consequential — and that distinguish a good evaluation programme from an excellent one.

The 10-point quality checklist

1. Visual inspection — size, colour, uniformity

Visual inspection is the fastest and cheapest quality gate. It should be the first thing you do when you open the sample, and it should be systematic rather than impressionistic. Define the parameters you are looking at before you open the bag.

Photograph the sample under standardised lighting (daylight-balanced, 5000K) before handling. This creates a visual record that you can reference if a dispute arises later and share with your quality team or customer.

Measure actual fruit count per 100 g (for figs) or calliper diameter (for apricots and cherries) against the declared grade. Grade substitution is best caught at this stage — if the supplier declared Grade 1 figs at 55-70 fruits per kilogram but the sample measures at 85-90, the conversation needs to happen before any commercial commitment.

| Parameter | How to measure | Dried fig acceptable | Dried apricot acceptable | Raisin acceptable | Tool | |-----------|---------------|---------------------|-------------------------|-------------------|------| | Size uniformity | Count per 100 g or calliper | AAA: 4.5-5.5 per 100 g; A: 7-9 per 100 g | Jumbo: 35 mm+; No. 1: 28-35 mm | No. 7: 8-12 mm berry diameter | Digital scale (0.1 g), digital calliper | | Colour uniformity | Visual against RAL/Pantone chart | Golden-amber, max 10% dark spots | Bright orange (sulphured) or dark brown (natural), uniform | Golden-green (sultana) or dark brown (raisin), uniform | Colour reference chart, daylight lamp | | Surface condition | 10x magnifier inspection | No mould spots, minimal sugar crust (< 15% surface) | No crystallisation, smooth skin | No fermentation spots, no sticky clumps | 10x hand lens, daylight lamp | | Shape integrity | Visual and tactile | No crushed or split figs > 5% | No torn or flattened fruit > 3% | No compressed clusters > 5% by weight | Visual | | Foreign matter (visible) | Spread sample on white tray | Zero visible foreign bodies | Zero visible foreign bodies | Zero visible foreign bodies | White inspection tray, forceps | | Insect evidence | 10x magnifier, UV lamp optional | No live insects, no frass, no webbing | No live insects, no frass, no webbing | No live insects, no frass, no webbing | 10x hand lens, optional UV lamp |

For a comprehensive breakdown of quality grades by product, see the dried fruit quality grades guide. Fig-specific grading is covered in depth in our wholesale dried figs quality guide.

2. Moisture content testing

Moisture content is the single most consequential measurable parameter in dried fruit quality. Too high, and you get mould growth, accelerated degradation, and the suspicion of intentional water addition for weight gain. Too low, and the product becomes excessively hard, loses sensory appeal, and may crack or fragment during transport.

The target moisture range differs by product and is tightly defined by trade standards and regulatory limits. The table below provides the operational ranges your evaluation should verify.

| Product | Target moisture % | Max moisture % | Reject above % | Method | Calibration note | |---------|------------------|---------------|----------------|--------|-----------------| | Dried figs | 24-26 | 26 | 28 | Oven drying (AOAC 934.06) or halogen moisture analyser | Calibrate against oven-dried reference at start of each session | | Dried apricots (sulphured) | 20-24 | 25 | 27 | Oven drying or halogen moisture analyser | Sulphured samples may give slightly faster readings; verify with oven method | | Dried apricots (natural) | 18-22 | 24 | 26 | Oven drying or halogen moisture analyser | Natural apricots are denser; ensure adequate sample grinding | | Raisins / sultanas | 14-18 | 18 | 20 | Oven drying or halogen moisture analyser | Small berry size gives fast equilibration; 3-5 g sample is sufficient | | Dried cherries | 14-18 | 18 | 20 | Oven drying or halogen moisture analyser | Check for sugar coating which may affect surface moisture reading | | Dried mulberries | 12-16 | 16 | 18 | Oven drying or halogen moisture analyser | Fragile structure; avoid excessive grinding | | Fruit powders | 3-6 | 6 | 8 | Karl Fischer titration or halogen moisture analyser | Hygroscopic — test immediately after opening the sample |

For fruit powder evaluation — including products like bulk apricot powder — Karl Fischer titration is preferred over the halogen method because powders are hygroscopic and begin absorbing atmospheric moisture within seconds of sample preparation.

A halogen moisture analyser (such as the Mettler Toledo HE53 or equivalent) provides results in 5-15 minutes per sample and is accurate to within 0.1% for most dried fruit matrices. For the definitive reference value, oven drying at 105 degrees C per AOAC 934.06 is the gold standard, but requires 4-6 hours. For routine sample evaluation, the halogen analyser is the practical choice; send a duplicate sample to a third-party lab using the oven method if the halogen reading is borderline.

Geothermal drying — the method used in Arovela's geothermal-dried fruit range — achieves tighter moisture uniformity than conventional hot-air tunnel drying because the lower operating temperature (40-65 degrees C) allows slower, more even moisture removal. This shows up in sample evaluation as lower standard deviation when you test multiple pieces from the same bag — a marker of process consistency. Read the geothermal drying parameters and nutrient retention guide for the science behind this.

3. Water activity measurement — predicting shelf life

Moisture content tells you how much water is in the product. Water activity (Aw) tells you how much of that water is available for microbial growth and chemical degradation reactions. They are related but not interchangeable, and relying on moisture content alone is one of the most common errors in dried fruit evaluation.

A product can have acceptable moisture content but dangerously high water activity if the water is poorly bound — for example, if drying was uneven and surface moisture has re-equilibrated with the interior. Conversely, a sample with added humectants (glycerol, sorbitol) may show low water activity despite elevated moisture content.

For dried fruit, the critical Aw thresholds are:

• Aw below 0.60: Safe from all microbial growth. Ideal for long-term storage and export with extended transit times.
• Aw 0.60-0.65: Safe from bacterial growth but moulds can begin to grow at the upper end. Acceptable for standard commercial shelf life (12-18 months) with proper packaging.
• Aw 0.65-0.70: Risk zone. Xerophilic moulds (including some aflatoxin-producing Aspergillus species) can proliferate. Requires enhanced packaging (MAP or desiccant) and shorter shelf life commitment.
• Aw above 0.70: Reject. Unacceptable microbial risk for dried fruit at ambient storage.

Measure water activity using a chilled-mirror dewpoint instrument (such as the METER AquaLab or Rotronic HygroLab). The measurement takes 5-10 minutes per sample and requires no consumables. Target Aw for most dried fruit samples is 0.55-0.65.

If the supplier provides a CoA with moisture content but no water activity data, request the Aw value separately. If they cannot provide it, test it yourself — this is a strong signal of the supplier's analytical sophistication and a useful data point for your supplier scoring matrix.

4. Sensory evaluation — taste, texture, aroma

Sensory evaluation is where human judgement adds value that instruments cannot replace. A product can pass every analytical test and still be unacceptable to your end customer because the flavour is flat, the texture is leathery, or the aroma carries an off-note.

Structure sensory evaluation with a standardised scorecard to make it repeatable and comparable across samples and evaluators. Use a trained panel of at least three people, and calibrate the panel against a known reference sample (your current best supplier or an internal standard) before scoring the test sample.

| Sensory attribute | 5 (Excellent) | 4 (Good) | 3 (Acceptable) | 2 (Below standard) | 1 (Reject) | |-------------------|---------------|----------|-----------------|--------------------|-----------| | Aroma | Clean, characteristic fruit aroma; no off-notes; intensity appropriate to product | Characteristic aroma with minor variation; no off-notes | Mild but recognisable aroma; slight deviation from typical | Weak or atypical aroma; faint off-note detectable | Off-aroma (fermented, musty, chemical, rancid); not characteristic of product | | Flavour | Full, complex fruit flavour; balanced sweetness; clean finish | Good fruit flavour; slightly less complex; clean finish | Acceptable flavour; minor deviation from typical profile | Bland or atypical flavour; mild off-taste | Off-flavour (fermented, sour, chemical); unpleasant aftertaste | | Texture | Soft, pliable, moist but not wet; appropriate chewiness | Slightly firm or slightly soft but within acceptable range | Noticeably firm or noticeably soft; still functional | Too hard, too sticky, or too dry; marginal for intended use | Rock-hard, mushy, or gritty; unacceptable for any use | | Visual appeal | Uniform colour, attractive appearance, size-consistent | Minor colour variation; still visually appealing | Noticeable variation; acceptable but not attractive | Significant colour variation; dark spots or bleaching visible | Heavily discoloured, mouldy appearance, or visually unappealing | | Overall impression | Would recommend without hesitation; exceeds specification | Meets specification fully; minor points of preference only | Meets minimum specification; adequate but not impressive | Below specification in one or more attributes; requires discussion | Below specification in multiple attributes; clear reject |

Score each attribute independently. Calculate the unweighted average for the overall sensory score. A sample scoring below 3.0 on the average should be rejected. A sample scoring 3.0-3.5 is conditionally acceptable — discuss with the supplier whether the issue is lot-specific or systemic before committing to a commercial order.

5. Defect count and classification

Defect counting is where you quantify what visual inspection identified qualitatively. Take a representative sub-sample (typically 300 g for small fruit like raisins, 500 g for larger fruit like figs and apricots), spread it on a white inspection tray under standardised lighting, and sort every piece into categories.

The defect types and grade-specific tolerance limits below are based on UNECE standards for dried fruit and Codex Alimentarius guidelines, adapted for the grades most commonly traded in B2B markets. The UNECE Standard DDP-13 for dried figs and similar standards for other dried fruit provide the international reference framework.

| Defect type | Description | Grade 1 max % | Grade 2 max % | Grade 3 max % | Auto-reject % | |-------------|-------------|---------------|---------------|---------------|---------------| | Insect damage | Entry or exit holes, frass, larvae, webbing | 2 | 5 | 10 | 15 | | Mould (visible) | Surface mould spots, internal mould on cutting | 1 | 3 | 5 | 8 | | Mechanical damage | Crushed, split, torn, or flattened pieces | 3 | 8 | 15 | 20 | | Discolouration | Abnormal dark spots, bleaching, uneven colour | 5 | 10 | 20 | 30 | | Sugar crystallisation (figs) | Heavy white sugar crust covering > 50% surface | 5 | 15 | 25 | 40 | | Fermentation | Sour smell, softening, alcohol/vinegar note | 0 | 1 | 3 | 5 | | Unripe / immature | Green colour, hard texture, undeveloped flavour | 2 | 5 | 10 | 15 | | Foreign matter | Non-fruit material (stems, stones, soil, other species) | 0.5 | 1 | 2 | 3 | | Total combined defects | Sum of all defect categories | 10 | 20 | 35 | 50 |

Express defect counts as a percentage of the total sample by weight (for large defects) or by piece count (for small, uniform fruit like raisins). Document defects with photographs — this becomes part of your evaluation record and is invaluable if you need to discuss quality issues with the supplier.

For a deeper understanding of how these defect limits map to commercial grades across product categories, see the dried fruit quality grades guide.

6. Foreign matter screening

Foreign matter goes beyond the visible check in step 1. Systematic foreign matter screening includes:

• Visual sort under magnification for stones, glass, metal fragments, wood splinters, insect parts, and extraneous plant material.
• Metal detection using a handheld metal detector or benchtop magnetic separator. Ferrous contaminants down to 1.5 mm and non-ferrous down to 2.5 mm should be detectable.
• Density separation by floating a sub-sample in a saline or sugar solution — heavy foreign matter (stones, glass) sinks while fruit floats.
• Sieve screening to detect fine particulate matter (soil, sand, dust) that may not be visible in a cursory inspection.

The tolerance for foreign matter in Grade 1 dried fruit is effectively zero for hard foreign bodies (metal, glass, stone) and below 0.5% by weight for soft foreign matter (stems, leaves, other plant material). Any hard foreign body is an auto-reject regardless of grade.

Suppliers operating under ISO 22000, HACCP, and GMP certification frameworks should have metal detection and foreign body controls integrated into their production line. Ask for the calibration records and rejection logs for their metal detectors and X-ray equipment — these records are a strong indicator of whether the food safety system is genuinely operational or merely certified on paper.

7. Size sorting verification

Size is a grade-defining parameter and a common point of dispute. Measure it objectively:

• Figs: Count per kilogram (or per 100 g and multiply). Grade AAA is 45-55 per kg; Grade A is 70-90 per kg. A deviation of more than 10% from the declared count indicates grade inconsistency.
• Apricots: Calliper diameter across the widest point. Jumbo is 35 mm+, No. 1 is 28-35 mm, No. 2 is 22-28 mm. Measure at least 30 pieces from the sample and calculate the average and standard deviation.
• Raisins and sultanas: Berry diameter by sieve grading. Spread 100 g on a calibrated sieve stack and weigh the fraction in each size band.

Uniformity matters as much as average size. A sample with the correct average diameter but high variance (some pieces very large, some very small) will create problems in automated packaging and portion control at your customer's facility. Calculate the coefficient of variation (standard deviation divided by mean) — it should be below 15% for a well-sorted lot.

8. CoA and documentation review

The documentation that accompanies the sample is as important as the physical product. A sample with excellent sensory and analytical results but weak documentation signals a supplier with inadequate quality systems — and quality systems determine what the commercial lots will look like, not what the carefully curated sample looked like.

Review the following documents against a checklist:

• Certificate of Analysis (CoA): Lot-specific (not generic), dated within the last six months, issued by an ISO 17025-accredited laboratory, with parameter name, method reference, numeric result, specification limit, and pass/fail determination for each test. Read our detailed CoA interpretation guide for what a compliant CoA should contain.
• Aflatoxin test report: Specific to the sample lot, tested by HPLC or ELISA, with B1 and total aflatoxin results reported separately. EU limits are 4 ug/kg for B1 and 10 ug/kg total; US FDA applies a 20 ug/kg action level. Non-negotiable for figs and apricots. For a market-by-market limits reference, see our aflatoxin and mycotoxin market guide.
• Phytosanitary certificate: Issued by the Turkish Ministry of Agriculture for the specific shipment.
• Organic certificate: If the product is declared organic, the EU organic control body certificate must be current and issued by a body recognised in the importing country.
• Facility certifications: ISO 22000, HACCP, BRC, IFS, GMP — copies should be current (not expired) and the scope should cover dried fruit processing (not just warehousing or trading).
• Allergen statement: Declaring the product's allergen status and cross-contamination risk.
• Nutritional data: Per 100 g, conforming to the labelling requirements of your destination market.

View our complete certifications portfolio for the documentation standards Arovela maintains across its supply chain.

9. Packaging integrity assessment

Packaging assessment during sample evaluation serves two purposes: it tells you about the supplier's packaging capabilities for commercial orders, and it protects the integrity of your evaluation (a poorly packaged sample may have degraded in transit, giving you false-negative results).

Check the following:

• Seal integrity: Inner vacuum seal or nitrogen-flushed pack should be intact on arrival. A broken seal means the sample has been exposed to ambient humidity and oxygen — note this in your evaluation record, as moisture and sensory results may be compromised.
• Desiccant presence: For low-Aw products (raisins, fruit powders), a desiccant sachet should be included inside the primary packaging.
• Light protection: Dried fruit is sensitive to photo-oxidation. The packaging should be opaque or UV-protective (aluminium foil laminate or metallised film). Clear plastic bags are acceptable only for short-term sample transit, not commercial packaging.
• Labelling accuracy: The sample label should include lot number, production date, best-before date, net weight, product name (with botanical name for species-specific products), origin, and storage instructions. Compare every data point on the label to the corresponding data on the CoA.
• Material specification: Request the packaging material specification (film structure, oxygen transmission rate, moisture vapour transmission rate) if you will be evaluating shelf life. A high-barrier film (OTR below 1 cc/m2/day) is essential for products with an 18-24 month shelf life target.

10. Shelf life accelerated testing

Accelerated shelf life testing (ASLT) is the most time-intensive checkpoint on this list, but it is the only way to validate the supplier's shelf life claim before committing to a commercial order with a 12-24 month best-before window.

The principle is straightforward: store the sample under elevated temperature and humidity conditions that accelerate degradation, then measure the rate of change in key parameters (moisture, Aw, colour, sensory score, microbial count) over time and extrapolate to ambient storage conditions.

A practical ASLT protocol for dried fruit:

1. Condition: 35-40 degrees C at 75% relative humidity (accelerated vs 20-25 degrees C and 50-60% RH ambient).
2. Duration: 4-6 weeks of accelerated storage approximates 12-18 months of ambient storage (acceleration factor approximately 10-15x for most dried fruit matrices).
3. Sampling points: Test at week 0, week 2, week 4, and week 6.
4. Parameters to track: Moisture content, Aw, colour (Lab* colorimeter), sensory score, total plate count, yeast and mould count.
5. Pass criteria: All parameters remain within specification through week 4 minimum. Sensory score does not drop below 3.0. Microbial counts do not exceed grade limits.

Not every sample requires ASLT — use it for new suppliers, new products, or any situation where the shelf life claim is critical to your commercial proposition. For ongoing supply from a qualified supplier, annual ASLT confirmation combined with per-lot moisture and Aw testing is a cost-effective ongoing assurance programme.

Supplier scoring matrix

Subjective judgement creeps into procurement decisions when there is no structured framework for comparison. The supplier scoring matrix below converts your 10-point checklist results into a single weighted score that makes supplier comparison objective and auditable.

Each checklist item receives a weight reflecting its relative importance in predicting commercial lot quality. The weights below are calibrated for general B2B dried fruit procurement — adjust them based on your specific product category, destination market, and risk profile.

| Criterion (Checklist Item) | Weight % | Score 5 (Pass) | Score 3 (Marginal) | Score 1 (Fail) | Your Score | |---------------------------|----------|---------------|--------------------|--------------|-----------| | 1. Visual inspection | 10 | All parameters within grade spec; uniform appearance | Minor deviations in 1-2 parameters; still within grade | Multiple parameters outside grade spec; visible defects | ___ | | 2. Moisture content | 15 | Within target range; consistent across replicates | Within max range but above target; minor variation | Above max or below minimum; high variation between pieces | ___ | | 3. Water activity | 10 | Aw below 0.60; consistent measurement | Aw 0.60-0.65; marginal for long-term stability | Aw above 0.65; microbial risk without enhanced packaging | ___ | | 4. Sensory evaluation | 15 | Average score 4.0+; no attribute below 3.0 | Average score 3.0-3.9; one attribute at 2.0-2.9 | Average score below 3.0; multiple attributes below 3.0 | ___ | | 5. Defect count | 15 | Total defects within Grade 1 limits | Total defects within Grade 2 limits | Total defects exceed Grade 2 or any auto-reject triggered | ___ | | 6. Foreign matter | 5 | Zero foreign matter detected | Trace soft foreign matter (< 0.3%); no hard bodies | Hard foreign matter detected or soft exceeds 0.5% | ___ | | 7. Size sorting | 5 | Average and CV within declared grade; CV below 15% | Average within grade but CV 15-20%; minor sizing spread | Average outside declared grade or CV above 20% | ___ | | 8. Documentation / CoA | 10 | Complete, lot-specific, accredited lab, all parameters pass | Minor gaps (missing 1-2 non-critical parameters); all results pass | Major gaps (no lot number, generic CoA, missing aflatoxin data) | ___ | | 9. Packaging integrity | 5 | Seal intact, desiccant present, label accurate, barrier film | Minor label errors; packaging functional but not optimised | Broken seal, no desiccant, major label discrepancies | ___ | | 10. Shelf life (ASLT) | 10 | All parameters stable through 4+ weeks accelerated | Minor drift in 1-2 parameters; stable through 2 weeks | Significant degradation before week 2; shelf life claim unsupported | ___ | | Total | 100 | | | | ___ / 500 |

Scoring interpretation:

• Weighted score 85-100%: Approve. The supplier meets or exceeds specification across all material criteria. Proceed to commercial order.
• Weighted score 70-84%: Conditional approve. The supplier is marginal on one or two non-critical criteria. Discuss the specific shortfalls, request corrective action or a second sample, and re-evaluate before committing to a full container.
• Weighted score below 70%: Reject. The supplier fails to meet minimum quality expectations. Document the specific failures and communicate them to the supplier with clear corrective requirements if you wish to maintain the relationship.

Calculate the weighted score by multiplying each criterion's score (1, 3, or 5) by its weight percentage, summing the products, and dividing by the maximum possible (5 x 100% = 500). For example, a perfect score on all items gives 500/500 = 100%.

Sample evaluation workflow — from receipt to decision

The workflow below maps the entire evaluation sequence from the moment the courier delivers the sample to the final approve/reject decision. It is designed for a procurement team with basic laboratory equipment, with third-party lab testing for confirmatory analysis.

| Stage | Action | Time required | Equipment | Decision gate | |-------|--------|--------------|-----------|---------------| | 1. Receipt and logging | Open outer packaging; photograph; verify seal integrity; log receipt date, weight, supplier details; compare label to COA | 15-30 minutes | Camera, digital scale, intake log form | Seal broken or weight discrepancy > 5%: flag and contact supplier before proceeding | | 2. Same-day visual and analytical | Visual inspection (size, colour, defects); moisture content test; water activity measurement; foreign matter screen; sub-sample allocation | 2-3 hours | White inspection tray, calliper, 10x lens, halogen moisture analyser, Aw meter, metal detector | Moisture above reject threshold or hard foreign body detected: stop evaluation, reject sample | | 3. Same-day sensory | Sensory panel (minimum 3 evaluators); score aroma, flavour, texture, visual appeal, overall impression | 1-2 hours | Sensory evaluation forms, reference sample for calibration, neutral palate cleansers | Average sensory score below 2.5: stop evaluation, reject sample | | 4. 48-hour laboratory | Send duplicate sub-samples to accredited third-party lab: full CoA confirmation (moisture, Aw, aflatoxin, heavy metals, pesticide residue, microbiology) | 24-48 hours (lab turnaround) | Pre-paid courier, lab submission form, chain-of-custody seal | Any parameter fails regulatory or specification limit: reject or conditional hold pending supplier response | | 5. Decision and documentation | Compile scoring matrix; calculate weighted score; photograph retained counter-sample; issue approve/conditional/reject decision in writing | 1-2 hours | Scoring template, archival storage container, written decision form | Score below 70%: reject. Score 70-84%: conditional. Score 85%+: approve |

Same-day receipt protocol

The first hours after sample receipt are the most time-sensitive. Execute the following steps on the day of arrival:

1. Photograph the outer packaging, shipping label, and seal condition before opening anything.
2. Verify the net weight against the declared weight on the shipping documents. A deviation greater than 5% should be logged and communicated to the supplier.
3. Open the outer packaging and inspect the inner seal. Record whether it is intact.
4. Divide the sample into sub-portions: evaluation portion (60%), lab submission portion (20%), and counter-sample retention portion (20%).
5. Store the counter-sample portion immediately in a sealed, labelled container under controlled conditions (15-20 degrees C, below 50% RH). This counter-sample is your insurance policy.
6. Begin visual inspection and analytical testing on the evaluation portion.

48-hour laboratory protocol

Within the first business day of receipt, prepare and send the laboratory sub-sample to your accredited third-party lab. Specify the test panel in advance and confirm turnaround time — most accredited labs offer a 48-72 hour express service for standard dried fruit panels.

The laboratory panel should cover, at minimum:

• Moisture content (oven method, AOAC 934.06)
• Water activity
• Aflatoxins B1, B2, G1, G2 and total (HPLC or LC-MS/MS)
• Heavy metals: lead, cadmium, arsenic, mercury (ICP-MS)
• Pesticide multi-residue screening (LC-MS/MS, minimum 400 compounds)
• Microbiology: total aerobic plate count, yeast and mould, E. coli, Salmonella

For products destined for the EU, ensure the lab tests against the limits in Commission Regulation (EC) No 1881/2006 for contaminants and Regulation (EC) No 396/2005 for pesticide residues.

Decision matrix: approve, conditional approve, reject

After all test results are compiled, apply the supplier scoring matrix and make the decision:

Approve: Weighted score 85% or above, no individual criterion scored at 1, all regulatory limits met, documentation complete. Issue a written sample approval letter referencing the specific lot number, test results, and the locked commercial specification.

Conditional approve: Weighted score 70-84%, or one non-critical criterion scored at 1 with a plausible corrective action. Communicate the specific shortfalls to the supplier in writing. Request either (a) a corrective action plan with timeline, or (b) a second sample from a different lot for re-evaluation. Do not place a commercial order until the condition is resolved.

Reject: Weighted score below 70%, any safety-critical parameter (aflatoxin, heavy metals, Salmonella) out of specification, or documentation fundamentally deficient. Communicate the rejection in writing with specific test results and the relevant specification limits. Retain all documentation and the counter-sample for at least 12 months in case the supplier disputes the finding.

Common mistakes in sample evaluation

Evaluating only the sample, not the documentation

The sample is a physical product. The documentation is a window into the supplier's quality management system. A beautiful sample with a generic CoA, expired facility certifications, and no lot-specific aflatoxin report tells you that the supplier can produce good product under controlled conditions (the sample) but may not have the systems to do so consistently at commercial volume.

Always evaluate the documentation with the same rigour as the product. If the CoA is incomplete, missing, or generic, that is a finding — not something to overlook because the fruit tasted good.

Ignoring water activity in favour of moisture alone

This is the most technically consequential mistake on this list. Moisture content and water activity are correlated but not equivalent. A product can have 24% moisture and Aw of 0.58 (safe) or 24% moisture and Aw of 0.68 (risky) depending on how the water is distributed and bound within the product matrix.

Two real-world scenarios where moisture-only testing fails:

1. Surface re-absorption: A well-dried product stored in a humid warehouse absorbs surface moisture. The average moisture may still be within specification, but the surface Aw is elevated, creating a mould risk on the outside while the core remains dry.
2. Humectant masking: Some suppliers add glycerol or sorbitol to maintain a soft texture. This binds water and lowers Aw, which is legitimate — but if your specification is based on moisture content alone, you may accept a product with higher total water content than intended, affecting weight-based pricing.

Always measure both. If you can only measure one, Aw is the more predictive parameter for shelf life and safety. But for commercial specifications and weight-based pricing, moisture content remains necessary.

Not retaining counter-samples

Counter-sample retention is the procurement equivalent of a backup. If a commercial lot arrives and fails QC, the first question is: did the sample we approved actually represent the approved quality, or has our evaluation record degraded? Without a retained counter-sample stored under controlled conditions, you cannot answer this question.

Best practice for counter-sample retention:

• Quantity: Minimum 20% of received sample, or at least 100 g, whichever is greater.
• Storage: Sealed, labelled container (lot number, date, supplier). Store at 15-20 degrees C, below 50% relative humidity, away from light and strong odours.
• Duration: Retain for the shelf life period of the product plus six months, or a minimum of 18 months, whichever is longer.
• Access control: Counter-samples should be accessible only to the quality team. They are not stock — they are evidence.

Accepting "representative" samples instead of lot-specific

A supplier may offer a "representative" sample that reflects their general quality level rather than a specific production lot. This is understandable early in a relationship — the supplier may not have a current lot available in the exact grade and size you are exploring. However, you should never approve a commercial order based on a representative sample.

The reason is statistical: a representative sample is selected by the supplier to show their best work. A lot-specific sample is drawn from the same batch that will fill your container. The variance between these two is the variance that matters for your incoming QC.

Before placing a commercial purchase order, insist on a lot-specific sample from the actual production run that will supply your order. Match the lot number on the sample to the lot number on the CoA to the lot number on the commercial invoice. If they do not match, the sample does not represent the shipment. See the B2B sample order best practices for how to specify lot-specific sampling in your RFQ.

FAQ

How many samples should I request from a new supplier?

Request a minimum of three separate samples when qualifying a new dried fruit supplier. The first sample should be from their current production lot in your target grade and size — this tells you what they are producing right now. The second should be from a different lot or production date, which reveals batch-to-batch consistency and whether the first sample was cherry-picked. The third should be a retained reference from their most recent export shipment to a market with comparable quality requirements (EU, US, or Japan), which demonstrates what they actually ship under commercial conditions rather than what they prepare for prospective buyers. Specify in your RFQ that samples must be lot-specific with matching CoA documentation, and request that each sample is sealed with a tamper-evident label referencing the lot number.

What equipment do I need for in-house dried fruit evaluation?

A practical in-house dried fruit evaluation laboratory requires five core instruments: a halogen moisture analyser (USD 2,000-5,000) for rapid moisture content testing, a chilled-mirror dewpoint water activity meter (USD 3,000-6,000) for Aw measurement, a digital calliper and precision scale for size verification, a 10x magnifying lens and daylight-balanced lighting setup for visual inspection, and a handheld metal detector (USD 500-1,500) for foreign matter screening. Total investment for a capable in-house lab is USD 7,000-15,000. This covers approximately 70% of the evaluation checklist. The remaining items — aflatoxin testing, heavy metals, pesticide residues, and full microbiology — require an accredited third-party laboratory. Budget USD 300-700 per sample for the third-party panel.

Can visual inspection alone determine dried fruit quality?

Visual inspection is necessary but never sufficient for quality determination. It reliably catches grade-relevant defects such as size deviation, colour non-uniformity, visible mould, insect damage, and foreign matter — these are the parameters that drive immediate reject decisions. However, visual inspection cannot detect moisture content above specification (the product may look and feel normal at 26-28% moisture), aflatoxin contamination (invisible to the naked eye), pesticide residues, heavy metal contamination, elevated water activity, or microbial loads below the visible mould threshold. In practice, a sample that passes visual inspection but fails analytical testing is more dangerous than one that fails visually, because the buyer is tempted to approve based on appearance and skip the lab work. Always pair visual inspection with moisture, Aw, and third-party analytical testing as a minimum.

How do I handle a sample that passes sensory but fails the CoA?

A sensory pass with a CoA failure is a reject until the discrepancy is resolved — the CoA governs regulatory compliance and contractual specification, while sensory governs market acceptability. The CoA failure takes precedence because a product that tastes excellent but exceeds the aflatoxin limit, pesticide MRL, or heavy metal threshold cannot legally be sold in your destination market. In practice, investigate the cause of the discrepancy: request the supplier re-test the same lot at a different accredited laboratory to rule out testing error, ask for a fresh sample from the same lot with a new CoA to confirm whether the failure is representative of the lot or an outlier, and review the CoA methodology to ensure the test was performed using the correct reference method for your specification. If re-testing confirms the failure, reject the lot regardless of sensory quality. If re-testing resolves the discrepancy, document the resolution and proceed with caution.

What is an acceptable defect rate for Grade 1 dried fruit?

Grade 1 dried fruit should have a total combined defect rate below 10% by weight, with individual defect category limits that vary by type. For the most commercially significant defects: insect damage should not exceed 2%, visible mould should stay below 1%, mechanical damage below 3%, and foreign matter below 0.5%. Fermentation should be at 0% for Grade 1 — any fermented pieces in a Grade 1 sample indicate a process control failure. These limits are consistent with UNECE Dried Fruit Standards and Codex Alimentarius guidelines, which serve as the international reference framework for dried fruit grading. For premium retail applications or customers with internal quality standards stricter than international trade norms, you may need to specify tighter limits in your purchase specification — for example, total combined defects below 5% for a premium snacking line.

Start your evaluation

Structured sample evaluation is the difference between procurement by hope and procurement by evidence. The 10-point checklist in this guide gives your team a repeatable, defensible process that catches quality problems at the lowest possible cost — before they become container-sized problems.

Arovela supplies geothermal-dried figs, apricots, raisins, and specialty dried fruit with full CoA documentation, lot-specific testing, and packaging to specification. Every sample ships with the analytical data your evaluation requires.

Ready to benchmark against your current suppliers? Browse our wholesale dried fruit range, review our certifications, or request sample and quote with your product specification and destination market. For guidance on structuring your first order after sample approval, see the B2B sample order best practices guide.