Abstract:
This research aims to study potential application of Gold Apple in cosmetics by extracting and evaluating an antioxidant activity of ethanol Gold Apple crude extracts. In addition, polysaccharide content, methoxyl percent and moisturizing effect of pectin, which extracted from dry residue of Gold Apple, were also determined. Gold Apple crude extract appeared as dark brown, sticky with slightly sweet smell. It has a yield as 23.95 % of fresh fruit. It exhibited antioxidant effect, examined by DPPH method as IC50 of 0.22 mg/ml. However, it showed 2.44 fold lower antioxidant activity than standard of vitamin C (IC50 = 0.09 mg/ml). Furthermore, it demonstrated the total phenolic content of 173.09 ± 1.65 mg GAE/g extract. Pectin extract of Gold Apple was brown orange color with percent yield of 25.95 % compared with dried weigh residue and 2.24 % compared with fresh fruit. Moreover, it showed amount of polysaccharide and methoxyl percent as 152.17 ± 9.79 mg GE/g and 13.84 %, respectively. Therefore, this pectin was classified as high methoxyl pectins. The structure of Gold Apple pectin was characterized by FTIR spectroscopy technique and it possessed the same structure as that of the commercial one. The moisturizing effect tested at 0.5 % pectin demonstrated the efficiency of
the extract to shallow the skin groove up and significantly increased moisture (15 240 min.) when compared to unapplied skin (p < 0.05).