MIC Antimicrobial Susceptibility - Online Calculator

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🦠 Microbiological Limit Sampling

Class 2 / Class 3 sampling plan: n / c / m / M decision

Sampling plan (n, c, m, M)

n (sample units)

c (allowable exceedances)

m (limit)

M (>m, class 3; blank = class 2)

Counts / results per sample (one per line)

Decision logic (ISO 4832 / microbiological sampling plans)

· Class 2 plan (no M): among n samples, the number of results >m must be ≤ c → acceptable.

· Class 3 plan (with M, M>m): any single result >M → whole lot rejected; otherwise the number of results >m must be ≤ c → acceptable.

· Common combinations: n=5, c=0 (pathogens, none allowed) / c=1~2 (colony limits).

Determine microbial limits online: total plate count and coliform results vs limits, with automatic ICMSF three-class sampling (n,c,m,M) judgment.