AssayIndex
Cross-section

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

768 recordsmedian 98.89 %spec 97.0 %
LaboratoryReportsGradientMS resolutionMedian purity %Published bias (pp)Bias-adjustedMethod suitability
Janoshik34330minHigh98.88+0.0098.88ADEQUATE
PeptideMeter11828minHigh98.76-0.0598.81ADEQUATE
Medutest10625minUnit98.89+0.0898.81ADEQUATE
VendorInvestigate7832minHigh98.71-0.1198.82ADEQUATE
Nordanalyt7535minHigh99.01+0.0298.99ADEQUATE
Kestrel4815minUnit99.78+0.2499.54BELOW CLASS MINIMUM
96.397.097.698.398.999.6100.2JanoshikJanoshik: Q1 98.36, median 98.88, Q3 99.31, n=343n=343PeptideMeterPeptideMeter: Q1 98.30, median 98.76, Q3 99.17, n=118outlier 96.69n=118MedutestMedutest: Q1 98.35, median 98.89, Q3 99.35, n=106n=106VendorInvestigateVendorInvestigate: Q1 98.21, median 98.71, Q3 99.11, n=78outlier 96.58n=78NordanalytNordanalyt: Q1 98.56, median 99.01, Q3 99.35, n=75n=75KestrelKestrel: Q1 99.00, median 99.78, Q3 99.93, n=48n=48 Purity (% area)
Figure. Semaglutide 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.