Interlaboratory Proficiency Test 09/2014 - Oil hydrocarbons in water and soil

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dc.contributor.author Nuutinen, Jari
dc.contributor.author Koivikko, Riitta
dc.contributor.author Leivuori, Mirja
dc.contributor.author Ilmakunnas, Markku
dc.date.accessioned 2015-03-02T10:30:19Z
dc.date.available 2015-03-02T10:30:19Z
dc.date.issued 2015
dc.identifier.isbn 978-952-11-4429-5
dc.identifier.issn 1796-1726
dc.identifier.uri http://hdl.handle.net/10138/153554
dc.description.abstract Proftest SYKE carried out the proficiency test (PT) for analysis of oil hydrocarbons in water and soil in November-December 2014. Three types of samples were delivered to the participants; synthetic sample, surface water and soil samples. In total, 15 laboratories participated in the PT. The evaluation of the performance was based on the z scores. In this proficiency test 77 % of the data was regarded to be satisfactory when the deviation of 20 to 40 % from the assigned value was accepted. Either the calculated concentration, robust mean, mean or median of the results reported by the participants was chosen to be the assigned value depending on the analyte. The uncertainty for the assigned value was estimated at the 95 % confidence interval and for calculated assigned values it was 1.9–3.5 %, for assigned values based on the robust mean it was 15.5 %, for assigned values based on the mean it varied from 3.3 to 20.9 %, and for median based assigned value the uncertainty for the assigned value was estimated to 22.3 %. fi
dc.language.iso en fi
dc.publisher Finnish Environment Institute fi
dc.relation.ispartofseries Reports of the Finnish Environment Institute 5/2015 fi
dc.subject pätevyyskoe
dc.title Interlaboratory Proficiency Test 09/2014 - Oil hydrocarbons in water and soil fi
dc.type Kirja fi
dc.identifier.laitoskoodi Suomen ympäristökeskus fi
dc.subject.ysa laboratoriot
dc.subject.ysa laboratoriotutkimus
dc.subject.ysa pätevyys
dc.subject.ysa luotettavuus
dc.subject.ysa hiilivedyt
dc.subject.ysa vesianalyysi
dc.subject.ysa maa-analyysi

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