Irawan, C., Yuliana, E., Solihat, I., Ningsih, D. P., Virgiyanti, S., Setyawati, S. R., & Tohir, M. (2026). Development and Validation of a Flame Atomic Absorption Spectrometry Method for Determining Cobalt in Mineral Premix for Animal Feed. Helium: Journal of Science and Applied Chemistry, 6(1), 49–57. https://doi.org/10.33751/helium.v6i1.24