AssayIndex
Cross-section

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

112 recordsmedian 99.13 %spec 99.0 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Janoshik5830minHigh99.09+0.0099.09ADEQUATE
Medutest1725minUnit99.05+0.0898.97ADEQUATE
PeptideMeter1628minHigh99.76-0.0599.81ADEQUATE
VendorInvestigate1132minHigh98.65-0.1198.76ADEQUATE
Nordanalyt6 n=635minHigh98.91+0.0298.89ADEQUATE
Kestrel4 n=415minUnit99.93+0.2499.69ADEQUATE
97.397.898.298.799.299.7100.1JanoshikJanoshik: Q1 98.61, median 99.09, Q3 99.64, n=58n=58PeptideMeterPeptideMeter: Q1 99.02, median 99.76, Q3 99.93, n=16n=16MedutestMedutest: Q1 98.54, median 99.05, Q3 99.59, n=17n=17VendorInvestigateVendorInvestigate: Q1 98.18, median 98.65, Q3 99.28, n=11n=11NordanalytNordanalyt: Q1 98.23, median 98.91, Q3 99.52, n=6n=6KestrelKestrel: Q1 99.65, median 99.93, Q3 99.93, n=4outlier 98.80n=4 Purity (% area)
Figure. Selank 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.