DefinePK

Abstract

Aloe vera gel can be used as raw material for medicine and pharmaceutical preparations by reducing the water content. By reducing the water content is expected to increase the levels of beneficial substances. Evaporation used is vacuum evaporator with maximum temperature 60oC. The purpose of this research is to estimate the time of evaporation to the properties of the Aloe vera extract gel. Evaporation of Aloe vera gel is done at 60oC and pressure 72 mbar. Evaporation time is varied at 30, 60, 90 and 120 minutes. At each evaporation time pH, density, refractive index and vitamin C. Vitamin C analysis using HPLC method with ascorbic acid standard. In the pH test, pH ranges from 4.5 to 4.3 at 120 minutes. The refractive index increases because of the longer evaporation time the higher the viscosity and the color closer to the yellow green. The density values ranged from 0.945 g / ml at 30 minutes and 1.0056 g / ml at 120 minutes. For the best vitamin C levels obtained at evaporation time of 120 minutes at 4.1 ppm. In this evaporation condition means vitamin C can be maintained.