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Interlaboratory proficiency test NW 2/2014 - Alkalinity, pH, nutrients and conductivity in natural waters
ISBN (pdf):978-952-11-4304-5 
Julkaistu:2014 
Julkaisusarja ja numero:Reports of the Finnish Environment Institute 15/2014 
Kieli:suomi 
Kustantaja:Finnish Environment Institute 
Saatavuus (pdf):http://hdl.handle.net/10138/135213 
Sivumäärä:84 
Tekijät:Mirja Leivuori; Kaija Korhonen-Ylönen; Teemu Näykki; Keijo Tervonen; Markku Ilmakunnas; Sari Lanteri; Riitta Koivikko  

48.00 €

Proftest SYKE carried out the proficiency test for the determination of alkalinity, nutrients, pH and conductivity in natural waters in February 2014. In total, 38 laboratories participated in the proficiency test. Either the calculated concentration or the robust mean of the results reported by the participants was chosen to be the assigned value for the measurand. The performance of the participants was evaluated by using z scores. In this proficiency test 86 % of the results were satisfactory when in the pH determination 0.2 pH unit and in other determinations the deviation between 5–15 % from the assigned value was accepted.


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