An elemental screen would show whether catalytic metal is present at a level that explains the rate. Twenty minutes on an ICP-MS and it is almost never done.
icp_ms_trace
ICP-MS for elemental impurities and for metal-complexed peptides.
Section 1
Contribution
Both submits records and annotates other people's.
Records submitted
7
n=7
Annotations
5
n=5
Median purity submitted
99.29%
n=7
Suppliers covered
6
n=7
Section 2
Records submitted
A submitter chose to buy this material and to pay for this assay. That choice is the selection mechanism behind the whole index and it is not random.
| Report | Compound | Supplier | Lot | Lab | Quarter | Purity % | Water % | Recovery % | Provenance | Flags | Result |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AX-2026-041881 | Semaglutide | SinoPep | SNP-2511-P4283 | Janoshik | 2026-Q2 | 97.97 | 3.48 | 97.7 | Buyer-sourced | 0 | PASS |
| AX-2025-018529 | BPC-157 | QYB | QYB-2506-B4259 | Nordanalyt | 2025-Q4 | 99.67 | 5.31 | 93.1 | Laboratory-retained | 0 | PASS |
| AX-2025-020666 | Tirzepatide | SGN | SGN-2506-J8349 | Medutest | 2025-Q3 | 97.89 | 1.82 | — | Buyer-sourced | 0 | PASS |
| AX-2025-020894 | Enclomiphene citrate | WXT | WXT-2506-V2798 | Kestrel | 2025-Q3 | 99.34 | 4.33 | 92.4 | Supplier-supplied | 0 | FAIL |
| AX-2025-019740 | Semaglutide | Homopeptide | HOMO-2506-V3648 | Nordanalyt | 2025-Q3 | 99.06 | 5.11 | 95.8 | Buyer-sourced | 1 | MARGINAL |
| AX-2025-018657 | Enclomiphene citrate | QSC | QSC-2501-L5841 | Medutest | 2025-Q2 | 99.64 | 5.66 | 93.3 | Buyer-sourced | 0 | FAIL |
| AX-2024-005214 | Tirzepatide | WXT | WXT-2402-B2476 | PeptideMeter | 2024-Q3 | 99.29 | 3.44 | — | Buyer-sourced | 0 | PASS |
Section 3
Annotations
Signed technical comments on records. The index does not moderate annotations for agreement with its own arithmetic, and several of these disagree with it. Where a handle has made the same point on several records, one instance is shown and the rest are reachable from the records themselves.
Purity at 99.84 % with an oxidation product as the largest named impurity describes material that was made well and travelled badly. Those are different problems with different owners.
Cold-chain failure has an analytical signature and this is what it looks like. It is also entirely preventable at the cost of a phase-change pack.
Total copper is one number; copper bound as the complex is another. The first is easy and the second needs a non-dissociating separation with elemental detection after it.
Showing 4 distinct comments of 5 annotations by this handle.