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 of…
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Testing
A closer look at the concepts, compounds, and questions that matter.
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,…
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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 prove…
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Sterility Testing vs. Endotoxin Testing
Sterility and bacterial endotoxin tests address different contamination risks. One looks for viable microorganisms under defined test conditions. The other detects or quantifies endotoxin…
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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 milligrams…
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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, assay, vial quantity, impurities,…
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What is 7x and 8x Peptide Testing?
Peptide Quality-Control Education 7X and 8X Peptide Testing: What Real Quality Control Means 7X and 8X peptide testing describe supplier-defined testing programs that combine…
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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 focus on terms…
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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…
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