Our peptide reference library cites independent testing benchmarks for general educational context. Below is a sample Certificate of Analysis format illustrating how this documentation is typically structured. These samples are for reference only and are not tied to any product sold on this Site.
High-Performance Liquid Chromatography is commonly used to report peptide purity as a percentage of total peak area. Reference entries citing ≥99% purity are based on typical HPLC traces reported in third-party literature.
Mass spec is commonly used to confirm the molecular weight and identity of a synthesized peptide, verifying that the expected amino acid sequence was produced.
Testing referenced in our library is typically performed by independent, U.S.-based analytical laboratories — not by the manufacturer — to keep results unbiased.
A typical Certificate of Analysis includes the following information for a given batch / lot number. The sample below illustrates this format for general educational reference only.
| Product Name & SKU | Identifies the exact compound and catalog number |
| Lot / Batch Number | Unique identifier tying the report to a specific production run |
| HPLC Purity | Reported purity percentage with chromatogram |
| Mass Spectrometry Result | Confirms molecular weight matches expected sequence |
| Appearance & Solubility | Visual and physical property notes |
| Testing Laboratory & Date | Name of the independent lab and date of analysis |
These sample reports show the type of documentation associated with HPLC/mass-spec testing of research peptides, for general educational context only.
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