Preparation and stability survey on aloe vera gel

Abstract

This study aimed to produce aloe vera gel without chemical preservatives and thereby investigate the stability for 4 weeks at room temperature and 4oC. Here, the aloe vera gel used the inner tissue of the aloe vera leaf to prepare four different formulas (A, B, C, and D) and stored them at room temperature (RT) and 4oC. The products were evaluated for stability using organoleptic tests, dynamic light scattering (DLS), zeta potential, and infrared spectroscopy (FTIR) techniques at four time points: after preparation, weeks 1, 2, and 3. The studied result showed that the products from formulas B and C were homogeneous gel form, mild aroma, no color change noted, and pH = 5.0 stable at room temperature and 4oC. The B, C, and D formulas presented DLS results at 4oC with average size stability during four weeks were 2,925.70 ± 459.16 nm, 2,902.00 ± 639.05 nm, and 3,494.70 ± 189.02 nm, respectively. The zeta results
of the C formula were stable in three weeks at 4oC. No changes in the chemical composition of aloe vera gel have been recorded through FTIR testing over 4 weeks when stored at room temperature and 4oC. Therefore, the aloe vera C gel formula prepared without adding chemical preservatives is stable for 4 weeks at 4oC and has potential for application in skin care for pets (dogs and cats).