AssayIndex
Cross-section

SLU-PP-332 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 SLU-PP-332, with a class minimum gradient of 15 min, the method is a live explanation.

32 recordsmedian 98.69 %spec 98.0 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Janoshik1330minHigh98.82+0.0098.82ADEQUATE
PeptideMeter6 n=628minHigh98.61-0.0598.66ADEQUATE
Medutest4 n=425minUnit98.48+0.0898.41ADEQUATE
Kestrel4 n=415minUnit98.62+0.2498.38ADEQUATE
Nordanalyt3 n=335minHigh98.30+0.0298.28ADEQUATE
VendorInvestigate2 n=232minHigh98.71, 99.16-0.11—ADEQUATE
97.698.098.498.899.299.6100.0JanoshikJanoshik: Q1 98.31, median 98.82, Q3 99.25, n=13n=13PeptideMeterPeptideMeter: Q1 98.03, median 98.61, Q3 98.85, n=6n=6MedutestMedutest: Q1 98.38, median 98.48, Q3 98.63, n=4n=4VendorInvestigateVendorInvestigate: Q1 98.82, median 98.94, Q3 99.05, n=2n=2NordanalytNordanalyt: Q1 98.30, median 98.30, Q3 98.87, n=3n=3KestrelKestrel: Q1 98.47, median 98.62, Q3 98.95, n=4outlier 99.71n=4 Purity (% area)
Figure. SLU-PP-332 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.