When evaluating research peptides, analytical testing and documentation are important parts of understanding product quality and consistency. One of the most useful documents researchers can review is a Certificate of Analysis, commonly referred to as a COA.
A COA provides analytical information about a tested sample and can help researchers evaluate characteristics such as identity, purity, and batch-specific testing results.
What Information Can a Peptide COA Include?
The information provided on a Certificate of Analysis depends on the laboratory and the type of testing performed. A peptide COA may include:
- Compound or peptide name
- Batch or lot identification
- Testing date
- Analytical testing method
- Purity results
- Molecular mass or identity information
- Laboratory information
When reviewing a COA, it is important to understand what was actually tested rather than relying on a purity percentage alone.
What Does Peptide Purity Mean?
Purity testing evaluates the composition of a sample and the relative amount of the intended peptide compared with other detectable components.
High-Performance Liquid Chromatography (HPLC) is one analytical technique commonly used in peptide research to separate components within a sample and evaluate its purity profile.
A reported purity percentage should therefore be considered together with the testing methodology and supporting analytical documentation.
HPLC and Mass Spectrometry
Two analytical techniques frequently used in peptide research are HPLC and mass spectrometry (MS).
HPLC can provide information about the purity profile of a sample, while mass spectrometry can provide information related to molecular mass and compound identity.
Because these methods provide different types of analytical information, reviewing the testing methods used can provide researchers with a more complete understanding of a sample.
Why Batch-Specific Testing Matters
Research compounds may be produced in different batches. Documentation associated with a specific batch or lot can provide greater traceability than documentation that is not connected to a particular production batch.
Batch identification allows analytical testing results to be associated with the specific research material being evaluated.
Transparency at True Peptides
At True Peptides, we believe researchers should have convenient access to available analytical documentation for research compounds.
Our COA Library provides access to available testing documentation for True Peptides research products, allowing researchers to review analytical information associated with individual compounds and batches.
Continue Exploring the True Peptides Research Library
The True Peptides Research Library provides educational resources covering peptide testing, analytical methods, purity, laboratory terminology, and individual research compounds.
Future resources will explore topics such as HPLC, mass spectrometry, peptide purity, lyophilization, laboratory storage considerations, and compound-specific research.
For laboratory and research purposes only. Not for human consumption.
