Journal of Public Health and Preventive Medicine 2021;32(2):26-29

doi:10.3969/j.issn.1006-2483.2021.02.006

Analysis of proficiency test for determination of manganese in drinking water in Shaanxi Province

Yu LIU 1 ; Wenting YUAN 1 ; Caixia WANG 1 ; Guoxia CHENG 1 ; Xiaoling NIE 1 ; Xiaocong LIANG 1 ; Tianlai LI 1

Affiliations

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Keywords

Drinking water; Manganese; Proficiency test; Z-score

Country

China

Language

Chinese

Abstract

Objective To understand and improve the laboratory detection capacity of water manganese in testing organizations of Shaanxi Province． Methods The self-made manganese capacity testing samples were used as the reference in this proficiency testing program. The homogeneity of the samples was tested by single factor analysis of variance. The t-test method was used to evaluate the stability of the samples. The results of manganese in water provided by participant laboratories were analyzed by the robust statistical technique Z-score. Results A total of 136 laboratories participated in the proficiency testing program throughout the province. Among them, 129 laboratories (including retest laboratory) or 94.85% of total participating laboratories obtained satisfactory results. Conclusion The water quality monitoring agencies of our province had shown a strong detection capability for the determination of metal elements in drinking water, which ensures to provide safe water supply to the residents in Shaanxi Province.