|
|||||
|
|
Evaluation of a Brazilian ion chromatography interlaboratory study |
|
| Authors: | Lucilena Rebelo Monteiro Daniela Graffitti Filipe Albano Darilena Porfírio Laercio Pires Fernandes Junior Marycel E. B. Cotrim Maria Aparecida Faustino Pires |
| Affiliation: | 1. Instituto de Pesquisas Energeticas e Nucleares/Comissao Nacional de Energia Nuclear, Av. Lineu Prestes, 2242, S?o Paulo, 05508-000, Brazil 2. CORSAN—Companhia Rio Grandense de Saneamento, Porto Alegre, Rio Grande do Sul, Brazil 3. Rede Metrológica do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil 4. Eletronorte Eletrobrás, Rod. Arthur Bernardes, s/n, Belem, PA, 66115-000, Brazil |
| Abstract: | This paper describes a Brazilian interlaboratory program study on anion measurement in synthetic water. The program described is promoted regularly since 2007 and recommended the use of ion chromatography as analytical technique for all participant laboratories. Two samples (X and Y) with different anion (fluoride, chloride, nitrite-N, nitrate-N, sulfate and phosphate-P) concentration levels were twice distributed in 2011. Each sample on each round had the homogeneity, and the stability tested for a period of 15 days. Upon ensuring the homogeneity and stability, the samples were distributed to 39 laboratories located around the country. The aim of this study was to verify the laboratories’ precision and to establish the measurement comparability among Brazilian laboratories that routinely use ion chromatography for water sample analysis. It was also possible to identify the most frequent sources of systematic and random errors for each measured anion, related to the ion chromatography technique. Some specific metrological issues related to the geographical region are discussed. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |