Testing Methods
Rigorous methods, plainly explained
Every panel below lists the instrumentation we use and how much sample material it requires, so there are no surprises when you ship.
Purity Analysis (HPLC/UV)
HPLC with UV-Vis Detection
High-performance liquid chromatography with UV detection to determine purity relative to any impurities or degradation products.
Net Content / Quantity Check
Gravimetric + HPLC Quantitation
Confirms the true quantity present in a sample against the labeled amount, accounting for residual solvents or moisture.
Identity Confirmation (LC-MS)
LC-MS (ESI+)
Liquid chromatography coupled with mass spectrometry to confirm molecular identity against expected molecular weight.
Endotoxin Analysis
Kinetic Chromogenic LAL, USP <85>
Quantitative bacterial endotoxin testing reported in EU/mL against defined acceptance limits.
Heavy Metal Analysis
ICP-OES, USP <232>/<233>
Quantitative elemental analysis for lead, mercury, arsenic, cadmium, and other regulated elemental impurities.
Rapid Sterility Screen
Membrane Filtration + Chromogenic Detection
Fast preliminary indicator of microbial burden (aerobic, anaerobic, yeast, and mold). Not a substitute for full compendial sterility testing.
14-Day Sterility Screening
Automated microbial detection, aerobic + anaerobic
Preliminary rapid results after 2 days of monitoring, with the COA updated upon completion of the full 14-day incubation.
Fentanyl Presence Analysis
Targeted LC-MS/MS Screening
Targeted screening for fentanyl and common fentanyl analogs. Reported as detected or not detected against an established cutoff.
pH Analysis
Potentiometric pH Measurement
Measures the pH of a reconstituted solution.
Benzyl Alcohol Content
HPLC with UV-Vis Detection
Quantifies the benzyl alcohol preservative concentration in bacteriostatic water by HPLC, reported against the labeled percentage.
Reconstitution & Solubility Check
Visual Clarity + HPLC Recovery
Confirms your peptide goes fully into solution. We reconstitute with your specified diluent at the target concentration and report time to full dissolution, visual clarity and particulate inspection, percent recovery of dissolved peptide by HPLC, and the pH of the reconstituted solution.
Microbial Enumeration
Plate Count, USP <61>/<62>
Quantitative microbial enumeration: total aerobic microbial count (TAMC) and total yeast and mold count (TYMC), reported as CFU against defined acceptance limits per USP <61> and <62>. A quantitative count, distinct from the pass/fail Rapid Sterility Screen.
Every COA includes both purity and identity
We never issue a purity number without identity confirmation — a purity result alone is an incomplete answer.
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