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.

15 recordsmedian 99.27 %spec 98.0 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Janoshik6 n=630minHigh99.28+0.0099.28ADEQUATE
PeptideMeter4 n=428minHigh99.25-0.0599.30ADEQUATE
Nordanalyt2 n=235minHigh99.27, 99.54+0.02—ADEQUATE
Medutest1 n=125minUnit99.68+0.08—ADEQUATE
VendorInvestigate1 n=132minHigh99.14-0.11—ADEQUATE
Kestrel1 n=115minUnit99.00+0.24—ADEQUATE
99.099.199.399.499.699.899.9JanoshikJanoshik: Q1 99.16, median 99.28, Q3 99.39, n=6outlier 99.81n=6PeptideMeterPeptideMeter: Q1 99.17, median 99.25, Q3 99.33, n=4n=4NordanalytNordanalyt: Q1 99.34, median 99.41, Q3 99.47, 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.