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, [S. l.], v. 5, n. 8, p. 1–6, 2026. Disponível em: https://www.h-tsp.com/index.php/ijaasr/article/view/337. Acesso em: 19 sep. 2026.