AssayIndex
Cross-section

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

22 recordsmedian 99.63 %spec 98.5 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Kestrel915minUnit99.71+0.2499.47ADEQUATE
Janoshik7 n=730minHigh99.61+0.0099.61ADEQUATE
Medutest2 n=225minUnit99.61, 99.46+0.08—ADEQUATE
VendorInvestigate2 n=232minHigh99.57, 99.39-0.11—ADEQUATE
PeptideMeter1 n=128minHigh99.33-0.05—ADEQUATE
Nordanalyt1 n=135minHigh99.65+0.02—ADEQUATE
99.199.299.499.599.799.9100.0JanoshikJanoshik: Q1 99.55, median 99.61, Q3 99.72, n=7outlier 99.15n=7MedutestMedutest: Q1 99.50, median 99.53, Q3 99.57, n=2n=2VendorInvestigateVendorInvestigate: Q1 99.44, median 99.48, Q3 99.52, n=2n=2KestrelKestrel: Q1 99.66, median 99.71, Q3 99.93, n=9n=9 Purity (% area)
Figure. Dihexa 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.