Species Authentication by DNA Barcoding - Raw Ingredient

The Species Authentication by DNA Barcoding service is intended for customers who need traceable laboratory evidence concerning the requested constituent, contaminant, authenticity marker or microbiological target in the submitted food matrix. The typical submitted matrix for this catalogue entry is Raw Ingredient. Applications include authenticity verification, adulteration investigations, label-claim support, supplier qualification and food-fraud control, but the exact reporting format and analytical sensitivity should be agreed with the receiving laboratory when the result must satisfy a formal specification. A typical technical approach is PCR/qPCR, digital PCR or sequencing as appropriate. The exact instrument, standard, extraction, digestion, calibration model, culture condition, reagent system or specimen-processing step may differ according to the receiving laboratory's validated scope. Where an ASTM, ISO, IEC, EPA, FDA, pharmacopeial, clinical, customer or in-house method is mandatory, that requirement should be stated when the test is booked. The laboratory should also confirm that its working range, selectivity, detection capability and quality-control scheme are appropriate for the expected level of Species Authentication by DNA Barcoding. Results produced outside a validated range may require dilution, repeat preparation, a different specimen quantity or a more sensitive method. Sample quality is especially important. Submit approximately 100–500 g or equivalent of Raw Ingredient, unless the laboratory specifies a different minimum after reviewing the method. The sample should represent the batch, location, patient, product, process stream or experimental condition that the customer actually wants to evaluate. Where the material is heterogeneous, replicate increments or a documented composite may be more defensible than a single convenient grab sample. Contamination, evaporation, moisture change, degradation, microbial growth, inappropriate anticoagulant, adsorption to the container, or alteration during transport can create a result that is analytically precise but not representative of the original material. Customers should retain the sample identity, collection record, batch or location information and any chain-of-custody documentation that links the laboratory result to the source material. This is particularly important when results will be compared over time, used in an investigation, submitted to a regulator, or relied upon in a commercial dispute. For this exact catalogue entry, identify the request as “Species Authentication by DNA Barcoding” and the matrix as “Raw Ingredient”. If the project involves multiple samples, keep the naming scheme consistent so the result for one specimen cannot be confused with another. Tell the laboratory about known interferents, treatments, formulation ingredients, service history or unusual sample conditions that could affect PCR/qPCR, digital PCR or sequencing as appropriate. The AnalysisAfrica listing should be used to arrange the test and sample logistics; the receiving laboratory remains responsible for confirming the final analytical procedure, sample acceptance and reportable scope. Catalogue quality-control reference AA-DESC-03016 distinguishes this description and its handling assumptions from other tests in the import set.