Result: VF 5% after preparation exists in gel form; characteristic brown color; aroma; sweet taste; does not separate into layers and precipitates at 10 - 45 degrees Celsius; fluoride concentration is 5.1%; indicators of heavy metals Arsenic (As) is 0.21ppm, lead (Pb) is 0.65ppm, mecury (Hg) is 0.11ppm.