Precision Mass Spec is a US-based laboratory specializing in LC-MS/MS (Liquid Chromatography–Mass Spectrometry) purity and identity testing. We provide high-precision chemical analysis for research peptides with unmatched speed, accuracy, and affordability.
Our mission is to occupy the Goldilocks Zone - delivering fast turnaround (typically 3 business days), competitive pricing (from $249 per test), and advanced analytical technology (LC-MS/MS and HPLC-UV) available to independent researchers and vendors. We believe that access to molecular-level compound verification should not be expensive, slow, or overseas.
Precision Mass Spec serves research vendors, compound suppliers, lab managers, and independent researchers who need verifiable, third-party testing for research chemicals. Our clients span the peptide research, performance enhancement, and pharmaceutical supply communities. Every client receives a full Certificate of Analysis with detailed chromatographic data, mass spectra, calculated purity percentages, and R² values - suitable for public sharing with customers.
We pair HPLC-UV with LC-MS/MS rather than relying on HPLC alone. HPLC-UV measures purity, but UV absorption on its own cannot distinguish between isomers - compounds with identical molecular weights. Our two-stage mass spectrometry system analyzes the molecular fingerprint of each compound, delivering parts-per-billion sensitivity and definitive isomer-level precision. This is the gold standard in pharmaceutical laboratories worldwide.
Precision Mass Spec is operated by a team of analytical chemists and lab professionals with expertise in mass spectrometry, chromatography, and pharmaceutical QC (quality control). We are a private, US-based laboratory, and we describe our methods, instrumentation, and reference standards on every COA so clients can judge the data on its merits. We are committed to providing independent, unbiased analysis and transparent reporting to our clients.
Questions about our methodology or services? Visit our FAQ or Technology page.