AssayIndex
Cross-section

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

94 recordsmedian 99.21 %spec 99.0 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Janoshik3830minHigh99.16+0.0099.16ADEQUATE
PeptideMeter1828minHigh99.31-0.0599.36ADEQUATE
Medutest1125minUnit99.27+0.0899.19ADEQUATE
VendorInvestigate1132minHigh98.70-0.1198.81ADEQUATE
Nordanalyt935minHigh98.69+0.0298.67ADEQUATE
Kestrel7 n=715minUnit99.93+0.2499.69ADEQUATE
97.297.798.298.799.299.6100.1JanoshikJanoshik: Q1 98.67, median 99.16, Q3 99.70, n=38n=38PeptideMeterPeptideMeter: Q1 98.76, median 99.31, Q3 99.80, n=18n=18MedutestMedutest: Q1 99.06, median 99.27, Q3 99.86, n=11n=11VendorInvestigateVendorInvestigate: Q1 98.03, median 98.70, Q3 99.32, n=11n=11NordanalytNordanalyt: Q1 98.31, median 98.69, Q3 98.88, n=9outlier 99.81outlier 99.93n=9KestrelKestrel: Q1 99.78, median 99.93, Q3 99.93, n=7outlier 99.36n=7 Purity (% area)
Figure. KPV 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.