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Interlaboratory Proficiency Test 13/2017 - Oil hydrocarbons in water and soil
Julkaistu:2018 
Julkaisusarja ja numero:8/2018 
Kieli:englanti 
Kustantaja:Suomen ympäristökeskus 
Sidosasu:pehmeäkantinen 
Sivumäärä:40 
Tekijät:Riitta Koivikko, Jari Nuutinen and Markku Ilmakunnas 

35.00 €

Proftest SYKE carried out the proficiency test (PT) for analysis of oil hydrocarbons in water and soil in November 2017. Three types of samples were delivered to the participants: synthetic sample, surface water and soil samples. In total, 16 participants joined in the PT. In this proficiency test 76 % of the results were satisfactory when deviation of 20–40 % from the assigned value was accepted. Basically, either the calculated concentration, the robust mean, or the median of the results reported by the participants was used as the assigned value for measurands. The evaluation of the performance of the participants was carried out using the z scores. Warm thanks to all the participants of this proficiency test!


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