O papel dos programas interlaboratoriais para a qualidade dos resultados analíticos

Química Nova

Queenie Siu Hang Chui²  João Marcos De Almeida Bispo¹  Célia Omine Iamashita¹ 

[1] ,Universidade São Francisco Unidade Acadêmica da Área de Ciências Exatas e Tecnológicas Itatiba SP

关键词: interlaboratorial program;    silicon metal of chemical grade;    certified reference material;   

DOI  :  10.1590/S0100-40422004000600026

来源: SciELO

【 摘 要 】

Interlaboratorial programs are conducted for a number of purposes: to identify problems related to the calibration of instruments, to assess the degree of equivalence of analytical results among several laboratories, to attribute quantity values and its uncertainties in the development of a certified reference material and to verify the performance of laboratories as in proficiency testing, a key quality assurance technique, which is sometimes used in conjunction with accreditation. Several statistics tools are employed to assess the analytical results of laboratories participating in an intercomparison program. Among them are the z-score technique, the elypse of confidence and the Grubbs and Cochran test. This work presents the experience in coordinating an intercomparison exercise in order to determine Ca, Al, Fe, Ti and Mn, as impurities in samples of silicon metal of chemical grade prepared as a candidate for reference material.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License