title: [Measurement uncertainty in drinking water analysis. Conclusions from interlaboratory tests].
abstract: The problems of measurement uncertainty, its estimation and the connection with the requirements of the drinking water legislation on the analytical methods are described. The difficulties with these requirements are shown. On the basis of numerous interlaboratory test data, the concentration dependences of the reproducibility standard deviation for 75 drinking water parameters were calculated using a variance function described in DIN 38402-45. From this function means of standard deviation at the legal limit could be calculated with high confidence. These values are compared with the requirements of the legislation. These data can be used on the one hand for the estimation of uncertainties in the laboratories or the plausibility check of uncertainties already estimated. On the other hand these data can be helpful for deriving an official interpretation or creating new requirements for the drinking water legislation.
authors.affiliation: Institut für Siedlungswasserbau, Wassergüte- und Abfallwirtschaft, Abt. Hydrochemie Bandtäle 2, 70569 Stuttgart, BRD. Michael.Koch@iswa.uni-stuttgart.de
authors.forename: M
authors.initials: M
authors.lastname: Koch
mesh_terms: D005062:European Union; D005858:Germany; D006801:Humans; D007753:Laboratories / Q000592:standards*; D008452:Maximum Allowable Concentration; D008962:Models, Theoretical; D011786:Quality Control; D012015:Reference Standards; D012016:Reference Values; D015203:Reproducibility of Results; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000592:standards; D014881:Water Supply / Q000032:analysis* / Q000331:legislation & jurisprudence* / Q000592:standards
chemical_list: D014874:Water Pollutants, Chemical