Ecological Systems and Devices Annotation << Back Critical Review of the EURACHEM/ EUROLAB/CITAC/NORDTEST/AMC GUIDE: MEASUREMENT UNCERTAINTY ARISING FROM SAMPLING: A GUIDE TO METHODS AND APPROACHES Rozental O.M., Sintsova T.N. An analysis of the EURACHEM/CITAC manual was carried out. Measurement uncertainty associated with sampling” and shows the feasibility of using traditional statistical defi nitions, such as mathematical expectation, dispersion, standard deviation. In view of the different genesis of the formation of research objects, it is proposed to use fundamentally different methods for calculating measurement uncertainty in the manual. The results in this document are relevant only for assessing the consistency of arithmetic mean values that do not depend on the distribution of the analyzed values, that is, a priori subject to the normal distribution, and their estimates can be considered “robust” (stable). It is shown that the accuracy of these estimates for the original distributions is not presented in the document. In this paper, it is proposed that if it is impossible to conduct an active experiment, to assess the total uncertainty, use statistical criteria of homogeneity and a universal indicator of homogeneity – the probability (level of signifi cance) with which the homogeneity hypothesis is accepted. Therefore, in practice, calculations of the measurement uncertainty associated with sampling must satisfy the following conditions: the sample measurement scheme must be understandable and minimally expensive; The calculation of uncertainty must be such that it can be reproduced by different users and must be based on appropriate methodology. Keywords: measurement uncertainty, sampling, analysis of variance, duplicate sampling method, active experiment. DOI: 10.25791/esip.2.2025.1501 Pp. 03-12.