Peak Labs
PEAK LABS
peaklabs.me · UAE
Peak Labs

Research Notes

Evidence-led notes on research peptides: purity and Certificate of Analysis interpretation, third-party testing, cold-chain handling and storage, written for researchers across the UAE and GCC. For research use only.

Abstract still life of a laboratory polarimeter sample tube and amber glass vials in warm gold and ivory studio light
Analytical Methods
21/08/2026 · 1 min read

Specific Rotation and Optical Rotation Testing for Research Peptide Identity

An overview of how polarimetry and specific rotation measurements serve as a stereochemical identity check for r...

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Peak Labs
handling
20/08/2026 · 1 min read

Bulking Agents and Cryoprotectants in Lyophilised Peptides

Lyophilised research peptides are often supplied with bulking agents or cryoprotectants added during freeze-dryi...

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Abstract laboratory still life with an analytical printout, brass calibration weights, and a glass pipette in warm gold tones
Analytical Testing
20/08/2026 · 1 min read

Measurement Uncertainty in Peptide COA Reports: Reading Plus-or-Minus Values and Significant Figures

A guide to interpreting uncertainty ranges, significant figures, and coverage factors on peptide certificates of...

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A magnifying glass over an embossed seal on a document, symbolising verification of laboratory accreditation
buyer guide
19/08/2026 · 1 min read

Verifying ISO/IEC 17025 Accreditation for Peptide Testing Labs

Learn what ISO/IEC 17025 accreditation means for a peptide testing laboratory, and how to independently verify a...

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Sealed amber laboratory vials with crimped caps and soft cold-chain frost, warm gold and ivory studio still life
GCC Sourcing
19/08/2026 · 1 min read

Container Closure Integrity Testing for Lyophilised Research Peptide Vials

How laboratories verify that a lyophilised research peptide vial's seal has remained intact, and why closure int...

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Editorial laboratory still-life of glass vials with rubber stoppers, crimp seals, and silica gel desiccant, in ivory and gold tones
handling
18/08/2026 · 1 min read

Vial and Closure Selection for Lyophilised Peptide Storage

An overview of glass vial types, stopper materials, and desiccant practices that protect lyophilised research pe...

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Abstract laboratory still life with a coiled glass ring beside a straight glass rod in warm gold and ivory tones
Analytical Methods
18/08/2026 · 1 min read

Cyclic vs Linear Peptides: Structural Differences and Their Impact on Identity and Purity Testing

A structural comparison of cyclic and linear research peptides and what ring closure means for mass spectrometry...

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Abstract editorial illustration representing chemical synthesis and biological expression as two parallel paths of peptide production
COA
17/08/2026 · 1 min read

Recombinant vs Synthetic Research Peptides: Purity Testing Differences

A comparison of how chemically synthesized and recombinant research peptides differ in production, and what each...

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Amber laboratory glass vials on a reflective surface with a faint glowing chromatography curve in warm gold and champagne tones
Analytical Methods
17/08/2026 · 1 min read

Ion Exchange Chromatography for Research Peptides: Detecting Charge Variants and Deamidation Products

An explainer on how ion exchange chromatography separates research peptides by net charge to reveal deamidation ...

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Abstract laboratory still-life of a mass spectrometer sample plate and coiled capillary tube in warm gold and ivory tones
COA Literacy
16/08/2026 · 1 min read

MALDI-TOF vs ESI-MS: Comparing Ionization Methods for Peptide Identity Confirmation

A laboratory-focused comparison of MALDI-TOF and ESI-MS ionization methods and what each contributes to peptide ...

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