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Microbiologist.in
Pharma QC microbiology, in your pocket
Check control results against 1-2s, 1-3s, 2-2s, R-4s, 4-1s and 10x.
Pro
z = (result − target mean) / SD; rules are applied to the latest results in order
Mean 100, SD 2, latest 107 → z = 3.5 → 1-3s: reject the run
Rules here use results of one control level in time order; across-level rules within a run need both levels. Choose rules for your assay's quality requirement.
For learning only. Reference intervals vary by laboratory, method and patient group; results are interpreted by qualified professionals with the clinical picture.