Interlaboratory Proficiency Test 08/2017 - Domestic water measurements

Visa fullständig post


Filer under denna titel

Totalt antal nerladdningar: Laddar...

Filer Storlek Format Granska
SYKEre_36_2017.pdf 1.500Mb PDF Granska/Öppna
Titel: Interlaboratory Proficiency Test 08/2017 - Domestic water measurements
Författare: Björklöf, Katarina; Leivuori, Mirja; Sarkkinen, Mika; Sara-Aho, Timo; Tervonen, Keijo; Lanteri, Sari; Ilmakunnas, Markku
Utgivare: Finnish Environment Institute
Datum: 2017
Språk: en
Tillhör serie: Reports of the Finnish Environment Institute 36/2017
ISBN: 978-952-11-4898-9
ISSN: 1796-1726
Permanenta länken (URI):
Abstrakt: Proftest SYKE carried out the proficiency test for analyses of raw and domestic drinking waters to which 45 participants took part. The performance of the participants was evaluated by using z scores. In this proficiency test 89 % of the results were satisfactory when the standard deviation for performance assessment varied between 5 and 25 %, and 0.2 units for pH, of the assigned value at the 95 % confidence interval. The amount of accepted results was similar to the previous round. The homogeneity and the stability of the samples (pH, NH4 and alkalinity) were tested and the samples were regarded to be sufficient homogenous and stable. Significant different results were observed for alkalinity results using two-point potentiometric titration with HCl (EN ISO 9963-1, national supplement) compared to results from one point titration with HCl according to SFS3005. Warm thanks to all the participants of this proficiency test!
Subject: pätevyyskoe
Subject (yso): laboratoriot

Detta dokument registreras i samling:

Visa fullständig post