Chemistry-PTM-OMA_Modules_1-4
OMA Collaborative (MLV) Study Designs
Method Type # Valid Data Sets Study Design per Collaborator
Statistics
Recovery, bias, LOD, LOQ, s r , s R
Quantitative ≥8
≥5 Materials 2 Replicates per material
Qualitative
≥10
1 Matrix 12 Replicates High 12 Replicates Low (fractional pos.*) 12 Replicates Non‐spiked
LPOD s r
with 95% CI with 95% CI
s R
s L If method comparison: dLPOD + CI (CI must include “0”)
*Fractional positives defined as LPOD = 0.25‐0.75
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