TY - T1 - Proficiency test SYKE 2/2013. Chlorophyll a, colour, conductivity, nutrients, pH and turbidity in natural waters SN - 978-952-11-4191-1 / 1796-1726 UR - http://hdl.handle.net/10138/40906 T3 - Reports of Finnish Environment Institute 20/2013 A1 - Korhonen-Ylönen, Kaija; Näykki, Teemu; Leivuori, Mirja; Tervonen, Keijo; Lanteri, Sari; Ilmakunnas, Markku A2 - PB - Suomen ympäristökeskus Y1 - 2013 LA - en AB - Proftest SYKE carried out the proficiency test for analysis of chlorophyll, colour, conductivity, nutrients, pH and turbidity in natural waters in February 2013. In total 44 laboratories participated in this proficiency test. The sample types were: artificial water sample, coastal water and natural water. Calculated concentrations or the robust mean of the results reported by the participant were used as the assigned values for measurements. The evaluation of the performance of the participants... VO - IS - SP - OP - KW - pätevyyskoe; laboratoriot; laboratoriotutkimus; pätevyys; luotettavuus; vesianalyysi N1 - PP - ER -