TY - JOUR A1 - Wilrich, Cordula A1 - Wilrich, P.-Th. T1 - Estimation of the POD function and the LOD of a qualitative microbiological measurement method JF - Journal of AOAC international N2 - Qualitative microbiological measurement methods in which the measurement results are either 0 (microorganism not detected) or 1 (microorganism detected) are discussed. The performance of such a measurement method is described by its probability of detection as a function of the contamination (CFU/g or CFU/mL) of the test material, or by the LODp, i.e., the contamination that is detected (measurement result 1) with a specified probability p. A complementary log-log model was used to statistically estimate these performance characteristics. An intralaboratory experiment for the detection of Listeria monocytogenes in various food matrixes illustrates the method. The estimate of LOD50% is compared with the Spearman-Kaerber method. KW - POD KW - LOD KW - Statistical method KW - Qualitative measurement PY - 2009 DO - https://doi.org/10.1093/jaoac/92.6.1763 SN - 1060-3271 VL - 92 IS - 6 SP - 1763 EP - 1772 PB - AOAC International CY - Arlington, Va. AN - OPUS4-20755 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -