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Lab Notes for people who read the label.
Plain-language notes on measurement, manufacture, handling, and the records behind research-use-only compounds.
Reading a certificate
01How to read a certificate of analysis
The lab, the lot, the method beside the values, and what a missing result means.
Read note →Reading a certificate
02HPLC and how to read a chromatogram
Retention time, peaks and area percent, and why area percent is not mass percent.
Read note →Reading a certificate
03Mass spectrometry: identity, not purity
Charge states and deconvolution, and why a correct mass says nothing about purity.
Read note →Quality and chemistry
04Purity, net content, net peptide content and salt forms
Why a powder can read 99% by HPLC and still be far from 99% peptide.
Read note →Quality and chemistry
05How peptides are made
Solid-phase synthesis step by step, and where the impurities come from.
Read note →Handling science
06Why research peptides ship as a powder
Freeze-drying, sublimation, the cake, and why dry material changes slowly.
Read note →Handling science
07Storage science for lyophilized material
How heat, light and moisture change dry material, and why the rule is cold, dark and dry.
Read note →Reference
08Glossary
Short definitions of the terms used across Lab Notes.
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