Interlaboratory Proficiency Test 04/2015 - Metals in natural waters and soil

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Title: Interlaboratory Proficiency Test 04/2015 - Metals in natural waters and soil
Author: Leivuori, Mirja; Koivikko, Riitta; Sara-Aho, Timo; Näykki, Teemu; Tervonen, Keijo; Lanteri, Sari; Väisänen, Ritva; Ilmakunnas, Markku
Publisher: Finnish Environment Institute
Date: 2015
Language: en
Belongs to series: Reports of the Finnish Environment Institute 32/2015
ISBN: 978-925-11-4526-1
ISSN: 1796-1726
Abstract: Proftest SYKE carried out the proficiency test (PT) for analysis of elements in natural waters and arable soil in April 2015. The measurements were: Al, As, Ba, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Se, Sr, Ti, U, V, and Zn. Four sample types were: synthetic, river and ground water and arable soil samples. In total 27 laboratories participated in the PT. In this proficiency test 89 % of the results were satisfactory when deviations of 10 - 35 % from the assigned values were accepted. Basically, the metrologically traceable concentration, calculated concentrations or the robust mean or mean of the results reported by the participant were used as the assigned values for measurements. The evaluation of the performance of the participants was carried out using z score. In some cases the evaluation of the performance was not possible e.g. due to the low number of the participants or the high deviation of reported results.
Subject: pätevyyskoe
Subject (ysa): laboratoriot

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