Understanding Certificates of Analysis

Understanding batch documentation and Certificates of Analysis

A Certificate of Analysis (COA) is a record of analytical results relating to a stated sample or batch. Understanding what the report does and does not establish is important when assessing laboratory research materials.

Match the batch

Compare the product name and batch or lot identifier on the report with the label on the material supplied. Results for a different batch should not be treated as results for your own batch.

Review the analytical methods

Check the laboratory name, report date, sample information, measurement units and test method. For example, chromatography may support an assessment of chemical purity, while mass spectrometry may be used to investigate molecular mass and identity. Neither method alone guarantees every aspect of quality.

Purity is not the same as content

A reported percentage purity, such as an HPLC area percentage, is not necessarily a measurement of the actual quantity of active material per vial. It also does not establish sterility, endotoxin levels, freedom from all contaminants, safety or suitability for administration. Different claims require appropriate separate testing.

Ask about documentation

Batch-specific analytical records are available where provided. If a report is not displayed or you need clarification, contact our team and include the product name and batch number. We do not claim every product or batch has every type of test.

Handling and intended use

Follow the applicable batch documentation and laboratory risk assessment. All research peptides and research compounds supplied by Abyss Biotech are intended for laboratory research and analytical applications, not human or veterinary consumption or self-administration.

Further information: Frequently Asked Questions · Storage & Stability · Research Use Policy.

Understand the numbers: Read our HPLC purity percentage guide for an explanation of chromatogram peak areas and why an HPLC purity percentage is not automatically a mass percentage.

Comparing test methods? Our HPLC versus LC-MS laboratory testing guide explains what chromatography and mass-spectrometry results can establish.