---
title: "Peptide purity: research glossary | Sable Peptides"
description: "Peptide purity is the proportion of the target peptide relative to all peptide-related species detected, usually measured by reversed-phase HPLC with UV de"
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---

Glossary

# Peptide purity

Peptide purity is the proportion of the target peptide relative to all peptide-related species detected, usually measured by reversed-phase HPLC with UV detection at around 214 to 220 nm. It is reported as a percentage of total peak area. Purity does not account for water or counter-ions, so it is distinct from net peptide content.

Source: [bachem.com](https://www.bachem.com/knowledge-center/quality-control-of-amino-acids-peptides-a-guide/)

## Related terms

-   [Peptide](/glossary/peptide)
-   [Net peptide content](/glossary/net-peptide-content)
-   [Peak area](/glossary/peak-area)

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