Interlaboratory Proficiency Test 01/2019 - Swimming pool water analysis

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Title: Interlaboratory Proficiency Test 01/2019 - Swimming pool water analysis
Author: Leivuori, Mirja; Tyrväinen, Sami; Sarkkinen, Mika; Koivikko, Riitta; Tervonen, Keijo; Lanteri, Sari; Väisänen, Ritva; Ilmakunnas, Markku
Publisher: Finnish Environment Institute
Date: 2019-04-03
Belongs to series: Reports of the Finnish Environment Institute 14/2019
ISBN: 978-952-11-5015-9
ISSN: 1796-1726
Abstract: Proftest SYKE carried out the proficiency test for the determination of chlorine, KMnO4, NO3, pH, turbidity, and urea in swimming pool waters in January-February 2019. In total, 22 participants joined in the proficiency test. In this proficiency test 93 % of the results evaluated with z score were satisfactory when deviation of 0.2 pH units for pH determination and 10–25 % for the other determinations was accepted from the assigned value. Of the results evaluated with En scores, 71 % were satisfactory. The calculated value, the robust mean or the median of the results reported by the participants was chosen as the assigned value for the concentration of measurands. Warm thanks to all participants in this proficiency test!

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