Overview

Each Certificate of Analysis confirms that a representative sample from the batch was tested using fit-for-purpose, industry-standard analytical methods. Results relate only to the specific batch tested and the corresponding current batch stock.

What our COAs include

• Peptide identity confirmation — spectrometric and spectral methods (LC-MS, FTIR) versus reference standards.
• Purity & impurity profiling — HPLC chromatographic separation to quantify purity and related impurities.
• Content / assay verification — confirmation of labelled peptide content within specified tolerances.
• Bioburden testing — USP <61> microbial screening.
• Bacterial endotoxin — USP <85> (chromogenic) assay.
• Elemental impurities — heavy-metal panel (arsenic, cadmium, lead, mercury, nickel, cobalt, vanadium) reported against detection limits where applicable.

Why we use these methods

Chromatographic and spectrometric techniques are widely recognised, reproducible, and efficient for routine batch quality control of research peptides. Our testing strategy focuses on validated methods that provide reliable identity, impurity, and purity data suitable for routine batch release.

Note: Advanced reference techniques are used where required for method development or standardisation, but are not mandatory for routine release once validated methods are in place.

Transparency & traceability

• Each batch is assigned a unique lot number.
• COAs include laboratory reference details and test dates.
• Results relate solely to the batch tested and current stock from that batch.
• COAs are published on our website for independent review.

Intended use

Research Peptides Europe supplies traceable, analytically verified materials intended exclusively for laboratory and scientific use.