Category: Testing
How Many Vials Should Be Tested From a Peptide Batch?
Why one tested vial cannot prove that every vial is identical, how representative sampling works, and why testing more vials increases the probability [...]
Net Peptide Content vs. Total Vial Weight: What Does the Number Really Mean?
The weight of dried material in a vial is not automatically the weight of the peptide itself. A lyophilized sample may also contain water, counterions [...]
LC-MS Explained: How Laboratories Confirm Peptide Identity
LC-MS can provide strong evidence that a sample contains a compound with the expected molecular mass. However, an intact-mass match alone may not prov [...]
Sterility Testing vs. Endotoxin Testing
Sterility and bacterial endotoxin tests address different contamination risks. One looks for viable microorganisms under defined test conditions. The [...]
A Peptide Can Be 99% Pure and Still Be Underfilled
Purity tells you how clean the detected peptide material appears under a particular analytical method. It does not automatically tell you how many mil [...]
How to Read a Peptide COA Without Being Misled
A certificate of analysis can contain useful evidence—or create false confidence. This guide explains how to separate identity, chromatographic purity [...]
What is 7x and 8x Peptide Testing?
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Endotoxin Testing in Peptide Products
Endotoxin Testing in Peptide Products
Why It Matters More Than Most People Realize
Introduction
When people evaluate peptide quality, they often fo [...]
MULTI-VIAL CONFORMITY TESTING
Multi-Vial Conformity Testing: Why One Vial Is Not Enough
In the peptide industry, one of the biggest problems hiding in plain sight is something mos [...]
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