Pengaruh Mol K3Fe(CN)6 pada Sintesis Zat Warna Biru Prusia berbahan Pasir Besi Muara Pantai Sunur Pariaman

Abstract

The aim of the study was to determine the effect of moles of K₃Fe(CN)₆ on the Prussian blue color, to obtain the optimum synthesis conditions. Coprecipitation and centrifugation methods for separating pigments from solvents. Fe₃O₄ was reacted with 96% H₂SO₄ to obtain Fe²⁺ ions, then reacted with K₃Fe(CN)₆, producing Prussian Blue. This study varied 3 samples of K₃Fe(CN)₆, the variation results were referred to as M1, M2 and M3. In sample M1, 3.037 mmol K₃Fe(CN)₆ was reacted at 30.37 mM. For sample M2, 9.87 mmol K₃Fe(CN)₆ 30.37 mM was reacted with 4.56 mmol FeSO₄ 0.018 mM, 250 mL. In sample M3, reacted with 12.21 mmol K₃Fe(CN)₆ 30.37 mM. In the variation of K₃Fe(CN)₆, the optimum is in the M2 sample. The maximum UV-Vis absorbance of M2 products is at 747 nm, according to the standard absorbance wavelength of Prussian Blue (680-740 nm), and the absorbance is relatively high.

Keywords — iron sand, potassium ferricyanide, prussian blue, pigment