Unbalanced robust ANOVA for the estimation of measurement uncertainty at reduced cost

doi:10.1039/c4ay90062f

Experimental methods of evaluating measurement uncertainty resulting from sample collection and preparation for analysis in chemical laboratories / Niepewność pomiaru wynikająca z poboru i przygotowania próbek do badań w laboratorium chemicznym oszacowana metodą doświadczalną

Ochrona Srodowiska i Zasobów Naturalnych ◽

10.2478/oszn-2014-0016 ◽

2014 ◽

Vol 25 (3) ◽

pp. 21-25

Author(s):

Mieczysława Giercuszkiewicz-Bajtlik ◽

Barbara Gworek

Keyword(s):

Measurement Uncertainty ◽

Experimental Method ◽

Evaluation Method ◽

Sample Collection ◽

Anova Analysis ◽

National Research Institute ◽

Precision Determination ◽

Simple Evaluation ◽

Robust Anova ◽

Made In

Abstract A measurement result should be presented with its measurement uncertainty determined according to the evaluation method. The paper presents an experimental method used to evaluate measurement uncertainty resulting from the collection and preparation of samples for analysis in chemical labs. Evaluation of measurement uncertainty of the content of particular elements in actual samples has been conducted with the method of precision determination using ROBUST ANOVA analysis of variance. Analyses of soil samples were made in the Laboratory of the Institute of Environmental Protection - National Research Institute. The experimental method of evaluating measurement uncertainty allows a fast and relatively simple evaluation of all sources of uncertainty resulting from sample collection and preparation for analysis in chemical labs

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National primary standard machine of Shore D hardness scale for metals and Leeb hardness scales

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2020-2-6-10 ◽

2020 ◽

pp. 6-10

Author(s):

A.E. Aslanyan ◽

E.G. Aslanyan ◽

S.M. Gavrilkin ◽

A.S. Doynikov ◽

A.N. Shchipunov

Keyword(s):

Measurement Uncertainty ◽

Primary Standard ◽

Metrological Characteristics ◽

National Primary Standard ◽

Hardness Scale ◽

Leeb Hardness

The article presents the results of studies to improve the National primary standard machine for hardness of metals on the shore D scale GET 161-2001, which were performed in FSUE “VNIIFTRI” from 2016 to 2018 in accordance with the technical task of Rosstandart.The improvement was carried out in order to ensure the uniformity of hardness measurements on the Leeb scales. The created new parts of the primary standard machine, which are settings for reproducing hardness numbers on the Leeb scales, are considered. Metrological characteristics of the upgraded and adopted National primary standard machine (GET 161-2019) were investigated, the budget of measurement uncertainty was calculated for reproducing hardness numbers on the Leeb scales.

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