Quality Assurance

Lab Testing & Quality Control

Every peptide we offer undergoes rigorous analytical testing before release. Our commitment to quality ensures researchers receive materials that meet the highest standards for purity, identity, and consistency.

Synthesis Control

State-of-the-art solid-phase peptide synthesis with real-time monitoring and controlled reaction conditions.

Third-Party Verification

All analytical testing performed by independent, accredited laboratories for unbiased results.

Batch Documentation

Complete traceability with unique batch numbers and comprehensive Certificates of Analysis.

Analytical Testing Methods

We employ industry-standard analytical techniques to verify the identity, purity, and quality of every peptide batch.

High-Performance Liquid Chromatography (HPLC)

Our primary analytical method for purity verification. HPLC separates, identifies, and quantifies each component in a peptide sample, ensuring ≥98% purity for all products.

C18 reversed-phase columnUV detection at 220nmGradient elution method

Mass Spectrometry (MS)

Precise molecular weight confirmation through mass-to-charge ratio analysis. Verifies peptide identity and detects any synthesis errors or impurities.

ESI-MS ionizationHigh-resolution detectionMolecular weight ±0.1 Da accuracy

Amino Acid Analysis

Quantitative determination of amino acid composition to verify the correct sequence and stoichiometry of each peptide.

Pre-column derivatizationHPLC separationFluorescence detection

Endotoxin Testing

LAL (Limulus Amebocyte Lysate) testing to ensure products are free from bacterial endotoxins, critical for sensitive research applications.

Kinetic turbidimetric method<0.25 EU/mg thresholdUSP compliant methodology

Certificate of Analysis

Every product ships with a unique batch number linked to comprehensive testing documentation. Access COAs through our searchable library or download directly from product pages.

Standard Specifications

Parameter	Specification	Method
Purity	≥98.0%	HPLC
Molecular Weight	Within ±0.1 Da of theoretical	ESI-MS
Appearance	White to off-white lyophilized powder	Visual
Solubility	Soluble in sterile water	Visual
Endotoxin	<0.25 EU/mg	LAL
Sterility	Sterile filtered	0.22μm filtration

Premium research-grade peptides with verified purity and comprehensive documentation.

1007 Calle Sombra
San Clemente, CA 92673
United States

Research Use Only: All products sold by NXS Peptides are intended strictly for laboratory and research purposes only. They are not intended for human or veterinary use, consumption, or any therapeutic application. By purchasing from NXS Peptides, you confirm that you are at least 18 years of age and that you will use these products solely for legitimate research purposes.