AssayIndex
Cross-section

Exenatide 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 Exenatide, with a class minimum gradient of 25 min, the method is a live explanation.

49 recordsmedian 98.98 %spec 98.0 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Janoshik2130minHigh98.98+0.0098.98ADEQUATE
PeptideMeter828minHigh98.63-0.0598.68ADEQUATE
Medutest825minUnit99.04+0.0898.96ADEQUATE
Nordanalyt6 n=635minHigh99.38+0.0299.36ADEQUATE
VendorInvestigate4 n=432minHigh99.04-0.1199.15ADEQUATE
Kestrel2 n=215minUnit98.18, 99.93+0.24—BELOW CLASS MINIMUM
97.798.198.598.999.399.7100.1JanoshikJanoshik: Q1 98.68, median 98.98, Q3 99.29, n=21n=21PeptideMeterPeptideMeter: Q1 98.38, median 98.63, Q3 98.81, n=8n=8MedutestMedutest: Q1 98.64, median 99.04, Q3 99.30, n=8n=8VendorInvestigateVendorInvestigate: Q1 98.85, median 99.04, Q3 99.15, n=4n=4NordanalytNordanalyt: Q1 99.06, median 99.38, Q3 99.42, n=6n=6KestrelKestrel: Q1 98.62, median 99.06, Q3 99.49, n=2n=2 Purity (% area)
Figure. Exenatide 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.