Analysis results of proficiency test for determination of lindane in drinking water in 2016
Cao, N.; Dong, M.; Yang, J.
Wei Sheng Yan Jiu 47(1): 89-92
2018
ISSN/ISBN: 1000-8020 PMID: 29903230 Document Number: 697653
To evaluate the capacity of national laboratories for determination of lindane in drinking water using proficiency testing program. The preparation method of the secondary standard materials were used as the reference for the sample preparation in this proficiency testing program. The homogeneity and stability of the samples were tested by single factor analysis of variance( ANOVA) and linear regression. The result provided by participant laboratories were analyzed by robust statistics and assessed using the Z-score. 309 laboratories throughout the country participated in the proficiency testing program. 286 laboratories, or 92. 6% of total participating laboratories, obtained satisfactory result. Results provided by 10 laboratories, or 3. 2% of total participating laboratories, were found to suggest doubts in their capacities. Finally, there were 13 laboratories, constituting 4. 2% of total participating laboratories, with result that were found to be outliers. The capacity of national laboratories for determination of lindane in drinking water has been ranked as satisfactory according to statistical analysis of the proficiency testing program result. Only a small portion of the participants require further improvement in their capacities.