Kelarutan Zat Warna Organik Dalam Gelasi Mikroemulsi Water In Oil Sistem Air, Surfaktan Kationik (Hexadecyl Trimethyl Ammonium Bromide) dan Pentanol

— Research on the solubility of organic dyes in gelation of water in oil ( w/o) microemulsion of the system of water, cationic surfactant hexadecyl trimethyl ammonium bromide (HTAB) and pentanol the purpose was to prepare gels from microemulsions ( w/o ) using the sol-gel method and determine the solubility of organic dyes in microemulsion gelation ( w/o ), determine density values and refractive index in microemulsion gelation ( w/o ). Gel preparation was carried out using the sol-gel method by adding TEOS and ethanol in a ratio of 1:8 mol which is hydrolyzed with water to form a gel, the percentage of solubility of organic dyes in turmeric powder at pH 4.5 and 9.5, namely 3.92% and 3.95%, then for dragon fruit peel powder namely 1.96% and 1.93% at pH 4,5 and 9.5, Respectively. Density testing can be done to see the concentration of the greatest value namely turmeric 0.9243 gram/cm 3 and 0.9244 gram/cm 3 for pH 4.5 and 9.5, Furthermore. the measurement of the refractive index to see the homogeneity of the largest solution, namely turmeric at pH 4.5 and 9.5 namely 1.4204 and 1,4219.