Gumilar, A., Putri, A.T., Dewi, M.A. and Ibrahim, S. 2025. SPECTROPHOTOMETRIC METHOD FOR DETERMINATION OF SELENIUM IN HEALTH SUPPLEMENTS USING 2,3 DIAMINONAPHTALENE AS COLORIMETRIC REAGENT. Acta Pharmaceutica Indonesia. 50, 2 (Dec. 2025), 89 - 94. DOI:https://doi.org/10.5614/api.v50i2.24847.