AssayIndex
Cross-section

Vilon 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 Vilon, with a class minimum gradient of 15 min, the method is a live explanation.

11 recordsmedian 99.15 %spec 99.0 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Janoshik6 n=630minHigh99.15+0.0099.15ADEQUATE
VendorInvestigate2 n=232minHigh99.04, 98.42-0.11—ADEQUATE
Nordanalyt2 n=235minHigh99.13, 99.46+0.02—ADEQUATE
PeptideMeter1 n=128minHigh99.51-0.05—ADEQUATE
Medutest025minUnit—+0.08—ADEQUATE
Kestrel015minUnit—+0.24—ADEQUATE
98.398.698.899.199.399.699.8JanoshikJanoshik: Q1 99.07, median 99.15, Q3 99.36, n=6n=6VendorInvestigateVendorInvestigate: Q1 98.58, median 98.73, Q3 98.89, n=2n=2NordanalytNordanalyt: Q1 99.21, median 99.29, Q3 99.38, n=2n=2 Purity (% area)
Figure. Vilon purity by contributing laboratory. Any offset between rows has two possible sources — a real difference in the material each laboratory happened to receive, and the laboratory's own bias — and this figure cannot separate them. The paired analysis that can is on inter-lab agreement.