Precision Mass Spec
Updated
Identity
- Precision Mass Spec describes its service as LC-MS/MS testing for compounds and peptides, and its site lists a COA Library and a Verify Product page. (Source: testwithprecision.com, read October 21, 2026.)
How verification works
Precision Mass Spec’s COA lookup takes a certificate code (PMS-…). Prof. Peptide’s matches were made with the lookup behind its COA Library, after a made-up code returned “No published COA found for that code.” (October 18, 2026).
A match confirms the record is Precision Mass Spec’s own, including its client; it does not confirm chain of custody between the tested sample and a specific vial.
Source: testwithprecision.com/coa-library, October 18, 2026.
Certificates Prof. Peptide matched at Precision Mass Spec
2 certificates from 1 vendor, each found at Precision Mass Spec’s own lookup after that lookup refused an invented code, and counted by the same rule as the vendor’s verification panel.
- Midwest Peptide · 2 certificates, checked October 18, 2026
Tests reported on the matched certificates
As the certificates above report them. A test absent from this list was not on these certificates; it says nothing about what Precision Mass Spec offers.
Purity (HPLC) · Net peptide content · Identity · Appearance · Heavy metals (ICP-MS) · Sterility (rapid test) · Endotoxin (LAL)
Limitations
- Prof. Peptide checks certificates through the same public lookup a reader would use, and has not visited the laboratory or observed testing directly.