Analysis of the Results of Proficiency Testing for the Determination of Total Zinc and Metallic Zinc in Zinc Powder
Keywords:
Zinc powder, Total zinc, Metallic zinc, Proficiency testing, Result analysisAbstract
A proficiency testing for the determination of total zinc and metallic zinc in zinc powder was carried out to examine the testing capabilities of each participating laboratory for the two parameters of total zinc and metallic zinc in zinc powder according to GB/T 6890-2012 "Zinc Powder". A total of 31 laboratories participated in this proficiency testing. Robust statistical analysis was performed on the results returned by the laboratories. The median value was used as the assigned value, and the normalized interquartile range (NIQR) was used as the standard deviation for proficiency assessment. The results of each laboratory were evaluated by the z-score. The results showed that for the total zinc parameter, the results of 27 laboratories were acceptable, and the results of 4 laboratories were problematic, with a satisfaction rate of 87.1%; for the metallic zinc parameter, the results of 28 laboratories were acceptable, the results of 2 laboratories were problematic, and the results of 1 laboratory were unacceptable, with a satisfaction rate of 90.3%. Factors such as the weighing and dissolution of samples, the instruments and reagents used, the titration operation process, and temperature can all affect the test results.
References
Wang, M., & Lai, A. C. (2026). Enhancing Upper-Room UVGI Performance through Rotating UV Source under Poorly-Mixed Ventilation Conditions. Journal of Hazardous Materials, 143089.
Narouei, F. H., Tang, Z., Wang, S. I., Hashmi, R. H., Welch, D., Sethuraman, S., ... & McNeill, V. F. (2025). Effects of germicidal far-UVC on ozone and particulate matter in a conference room. Plos one, 20(8), e0328224.
Xiao, J., Hai, L., Li, Y., Li, H., Gong, M., Wang, Z., ... & He, D. (2022). An Ultrasmall Fe3O4‐Decorated Polydopamine Hybrid Nanozyme Enables Continuous Conversion of Oxygen into Toxic Hydroxyl Radical via GSH‐Depleted Cascade Redox Reactions for Intensive Wound Disinfection. Small, 18(9), 2105465.
Zhang, H. H., & Lai, A. C. K. (2026). Synergistic air disinfection by far-UVC and negative air ions in a portable device. Journal of Hazardous Materials, 141402.
Mogensen, E. H., Jensen, J. T., Skaarup, S. H., Hvass, A. F., Jeppesen, C. L., Rasmussen, M. H., ... & Holm, C. K. (2025). Ceiling-mounted far-UVC fixtures reduce the surface bioburden in occupied clinical areas. Infection Control & Hospital Epidemiology, 46(6), 647-649.
Ross, A., Eadie, E., Ibbotson, S. H., & O'Mahoney, P. (2023). Public acceptance of the use of Far-UVC for virus inactivation: Challenges and opportunities. IPEM-Translation, 5, 100017.
Chen, X. (2023). Some thoughts on archival management at the grassroots level in the era of big data. Shaanxi Archives, (6), 56–57.
Sun, H. (2023). Practice and reflection on the construction of digital archives in the era of big data. Lantai Inside and Outside, (36), 37–38, 41.
Jiang, J., & Huang, C. (2022). Analysis of the comprehensive characteristics of archival data mining in the era of big data. Heilongjiang Archives, (2), 107–109.
Xu, W., & Wang, Y. (2023). Exploration of digital transformation of archival management in the information age. Heilongjiang Archives, (6), 129–131.
Xiao, Y. (2022). Research on the data transformation of archival management from the perspective of the internet. Science and Technology Wind, (36), 70–72.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2026 Geng Xin
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
