P21 by laboratory
The same compound measured by different laboratories on different gradients. Where the medians differ, the question is whether the material differed or the method did — and for P21, with a class minimum gradient of 15 min, the method is a live explanation.
| Laboratory | Reports | Gradient | MS resolution | Median purity % | Published bias (pp) | Bias-adjusted | Method suitability |
|---|---|---|---|---|---|---|---|
| Janoshik | 4 n=4 | 30min | High | 99.23 | +0.00 | 99.23 | ADEQUATE |
| Medutest | 1 n=1 | 25min | Unit | 99.40 | +0.08 | — | ADEQUATE |
| VendorInvestigate | 1 n=1 | 32min | High | 99.05 | -0.11 | — | ADEQUATE |
| Nordanalyt | 1 n=1 | 35min | High | 99.52 | +0.02 | — | ADEQUATE |
| Kestrel | 1 n=1 | 15min | Unit | 99.02 | +0.24 | — | ADEQUATE |
| PeptideMeter | 0 | 28min | High | — | -0.05 | — | ADEQUATE |