Irawan, C.; Yuliana, E.; Solihat, I.; Ningsih, D. P.; Virgiyanti, S.; Setyawati, S. R.; Tohir, M. Development and Validation of a Flame Atomic Absorption Spectrometry Method for Determining Cobalt in Mineral Premix for Animal Feed. Helium J Sci Appl Chem 2026, 6, 49-57.