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Certificate of Analysis (COA)

A certificate of analysis (COA) is the batch-specific document listing the test methods and results for one production lot. It should state purity

Related terms

  • HPLC purity — HPLC purity is the purity value measured by high-performance liquid chromatography.
  • Counterion — A counterion is the charged species that pairs with a peptide to form a neutral salt.
  • TFA salt vs acetate salt — TFA salt and acetate salt are the two most common peptide salt forms.
  • Peptide content vs purity — Peptide content and purity are two different measurements.

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