- W, Syukur S, Aziz H. DETERMINATION OF CALCIUM (Ca) AND MAGNESIUM (Mg) CONTENT IN CACAO (Theobroma cacao Linn) FERMENTATION AND NON FERMENTATION BY SPECTROPHOTOMETRY. J.Ris.Kim. [Internet]. 2015 Feb. 11 [cited 2026 Sep. 22];3(1):96. Available from: https://jrk.fmipa.unand.ac.id/index.php/jrk/article/view/104