AssayIndex
Cross-section

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

18 recordsmedian 99.06 %spec 98.0 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Janoshik7 n=730minHigh99.17+0.0099.17ADEQUATE
PeptideMeter6 n=628minHigh99.05-0.0599.09ADEQUATE
VendorInvestigate2 n=232minHigh98.76, 98.45-0.11—ADEQUATE
Nordanalyt2 n=235minHigh99.47, 99.01+0.02—ADEQUATE
Kestrel1 n=115minUnit99.46+0.24—ADEQUATE
Medutest025minUnit—+0.08—ADEQUATE
98.298.598.799.099.299.599.7JanoshikJanoshik: Q1 99.09, median 99.17, Q3 99.33, n=7outlier 98.35n=7PeptideMeterPeptideMeter: Q1 99.00, median 99.05, Q3 99.06, n=6n=6VendorInvestigateVendorInvestigate: Q1 98.53, median 98.61, Q3 98.68, n=2n=2NordanalytNordanalyt: Q1 99.13, median 99.24, Q3 99.36, n=2n=2 Purity (% area)
Figure. Thymulin 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.