Related Experiment Video
Updated: Feb 9, 2026

Hydrogen Charging of Aluminum using Friction in Water
Published on: January 28, 2020
[Study on proficiency test for determination of aluminum in drinking water in 2016]
Jiaolan Yang1, Ningtao Cao1, Mengmeng Dong1
1National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China.
Objective:
To evaluate the capacity of national laboratories for determination of aluminum in drinking water using proficiency testing program.
Methods:
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.
Results:
590 laboratories throughout the country participated in the proficiency testing program. 533 laboratories, or 90. 3% of total participating laboratories, obtained satisfactory result. Results provided by 7 laboratories, or 1. 2% of total participating laboratories, were found to suggest doubts in their capacities. Finally, there were 50 laboratories, constituting 7. 6% of total participating laboratories, with result that were found to be outliers.
Conclusion:
The capacity of national laboratories for determination of aluminum 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.
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