Homogeneity study of candidate reference material in fish matrix

7th Brazilian Congress on Metrology

Ulrich, J.C.^1 ; Sarkis, J.E.S.^1 ; Hortellani, M.A.^1

Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN-SP, Cidade Universitária, Travessa R, São Paulo

400, Brazil^1

关键词: Candidate reference materials;    Fish tissue;    Homogeneity studies;    Methylmercury;    One parts;    Statistical tools;    Statistical treatment;    Thompson;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/575/1/012040/pdf
DOI  :  10.1088/1742-6596/575/1/012040

来源: IOP

【 摘 要 】

A material is perfectly homogeneous with respect to a given characteristic, or composition, if there is no difference between the values obtained from one part to another. Homogeneity is usually evaluated using analysis of variance (ANOVA). However, the requirement that populations of data to be processed must have a normal distribution and equal variances greatly limits the use of this statistical tool. A more suitable test for assessing the homogeneity of RMs, known as sufficient homogeneity, was proposed by Fearn and Thompson. In this work, we evaluate the performance of the two statistical treatments for assessing homogeneity of methylmercury (MeHg) in candidate reference material of fish tissue.