Research Notes

Editorial illustration of a glowing isotopic mass spectrum cluster beside a laboratory glass vial on an ivory background

COA

18/09/2026 · 1 min read

Stable Isotope-Labeled Peptides: Verifying Isotopic Purity

An overview of stable isotope-labeled research peptides, their role as internal standards in mass spectrometry, ...

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Editorial illustration of a sealed glass sample vial in an archival storage rack with a labelled retention tag

COA

17/09/2026 · 1 min read

Retention Samples: Why Peptide Suppliers Keep Reserve Batches

An explanation of what retention (reserve) samples are, why disciplined research reagent suppliers keep them, an...

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Editorial still life of a magnifying glass beside a printed chromatogram with a highlighted peak and a clipboard of documentation, in ivory and muted gold tones, representing a laboratory quality investigation

COA

16/09/2026 · 1 min read

Out-of-Specification (OOS) Investigations in Peptide Testing

An out-of-specification (OOS) result is a documented deviation from expected test values, and how a testing labo...

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Row of glass vials showing lyophilised peptide cake appearance ranging from intact to cracked and shrunken

handling

15/09/2026 · 1 min read

Visual Inspection of Lyophilised Peptide Cake Appearance

What cake structure, color, and texture reveal about a lyophilised research peptide vial, and which visual defec...

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Editorial illustration of glass laboratory vials in a row with some singled out for inspection, representing statistical batch sampling and quality verification

buyer guide

14/09/2026 · 1 min read

Acceptance Sampling for Research Peptide Batch Verification

An explanation of acceptance sampling statistics and how they determine how many vials from a peptide lot are te...

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Editorial vector illustration of a peptide backbone ribbon with attached PEG coils, glycan hexagon rings, and a lipid tail motif in gold and charcoal on an ivory background

glossary

13/09/2026 · 1 min read

Analytical Effects of PEGylation, Glycosylation, and Lipidation

PEGylation, glycosylation, and lipidation are structural modifications that change a research peptide's mass, po...

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Two plain glass sample vials with white lyophilised powder on a laboratory bench, editorial still life

buyer guide

12/09/2026 · 1 min read

Custom vs Catalog Research Peptides: What to Verify Before You Order

A comparison of custom-synthesis and catalog research peptides, covering the documentation, lead time, and verif...

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Editorial laboratory still life of a pH meter with glass electrode and calibration buffer beakers on an ivory bench with gold and charcoal accents

handling

11/09/2026 · 1 min read

pH Meter Calibration and Buffer Verification for Peptide Research

A practical guide to pH meter calibration and buffer verification in peptide research settings, covering electro...

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Editorial still-life illustration of a water activity measurement chamber and lyophilised sample cups in ivory and muted gold tones

handling

10/09/2026 · 1 min read

Water Activity vs Moisture Content in Lyophilized Peptide Storage

Water activity and percent moisture measure different things in lyophilised research peptides. This article expl...

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Editorial still life of precision micropipettes in a stand on a laboratory bench with an analytical balance in soft focus, in cream and muted gold tones

handling

09/09/2026 · 1 min read

Micropipette Calibration for Research Peptide Laboratories

Explains why regular gravimetric calibration of micropipettes matters for research peptide work, and how ISO 865...

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