$200 per sample. 3–5 business day turnaround. Agilent LCMS with Diode Array Detection. Molecular weight confirmation, impurity identification, and a full Certificate of Analysis — mail-in from anywhere in the US.
Flat rate — no hidden fees
| Content Analysis | $25 |
| pH Testing | $30 |
| Heavy Metals Screen | $150 |
| Endotoxin Testing | $250 |
| Sterility Testing | $300 |
Rush processing available — contact us for availability and pricing.
Every ZyntroTest peptide purity COA is generated from raw instrument data on our Agilent LCMS platform — not a template or estimate.
LCMS-DAD purity calculated from chromatogram peak areas. Reported as percentage of target compound versus total detected material.
Mass spectrometric measurement of your peptide's molecular weight, confirming identity beyond retention time. Confirms the correct sequence is present.
Each detected impurity is identified (where structurally assignable) and quantified as a percentage. Deletion sequences, oxidation products, and synthesis by-products are reported individually.
The actual instrument output showing all peaks detected in your sample. The chromatogram is the verifiable evidence behind the purity number — included in every ZyntroTest COA.
Sample name, lot/batch number, receipt date, and ZyntroTest sample ID. Ties the COA to your specific submission — not a generic product certificate.
Results reviewed and signed by a ZyntroTest analyst. Accessible via our public COA verification portal by sample ID — any buyer can confirm authenticity.
Complete our online sample submission form with your compound name, expected purity, and any known sequences.
Ship minimum 5mg of sample in a sealed vial. Lyophilized or dissolved in DMSO both accepted. Label with your name and sample ID.
Mail to ZyntroTest, 1511 Texas Ave S, PMB 208, College Station, TX 77840. Standard shipping is fine — no dry ice required for most peptides.
We confirm receipt by email, assign your sample to our queue, and run LCMS analysis on our Agilent platform within the standard 3–5 day window.
Your Certificate of Analysis is delivered by email and published to our public COA search portal. Pay securely upon receipt.
Most peptide COAs in circulation are generated by HPLC with UV detection. Here's what that misses compared to LCMS.
| Capability | HPLC-UV (common) | LCMS-DAD (ZyntroTest) |
|---|---|---|
| Purity measurement | ✓ Yes | ✓ Yes |
| Molecular identity confirmation | ✗ No — retention time only | ✓ Molecular weight by MS |
| Deletion sequence detection | ✗ Often co-elutes, invisible | ✓ Detected by mass difference |
| Oxidation product identification | ✗ Hidden in main peak | ✓ +16 Da resolved by MS |
| Novel impurity identification | ✗ Cannot assign structure | ✓ Mass spectrum reveals identity |
| Full UV spectral data | ✗ Fixed wavelength only | ✓ DAD: full spectrum across run |
| COA verifiability | ✗ Purity number without ID proof | ✓ Mass + UV + chromatogram |
Read more: LCMS vs. HPLC — What Mass Spectrometry Shows That UV Detection Misses →
$200 per sample · 3–5 business days · Full COA with chromatogram · Mail-in from any US state