Xin, Geng. “Analysis of the Results of Proficiency Testing for the Determination of Total Zinc and Metallic Zinc in Zinc Powder”. International Journal of Advance in Applied Science Research 5, no. 8 (September 4, 2026): 1–6. Accessed September 19, 2026. https://www.h-tsp.com/index.php/ijaasr/article/view/337.