Kajian Proses Pasteurisasi Jelly Drink Cincau Hijau-Rosela Dalam Kaleng untuk Menghasilkan Daya Antioksidan Optimum.

Abstract

Green grass jelly (Premna oblongifolia Merr.) and roselle (Hibiscus sabdariffa L. Merr.) are local food commodities that can be used to alleviate increased prevalence of metabolic syndrome. The purpose of this research is to study thermal process of green grass jelly-roselle jelly drink product with minimum antioxidant capacity decrease. This research was done in two stages; (1) thermal process treatment and (2) product’s antioxidant capacity characterization. Thermal process treatment is carried out by treating the samples at different combination of time and temperature to achieve pasteurization value equal to 6D85 (at 65 °C pasteurization requires 7.2 minutes, at 75 °C req. 5.25 minutes, and 85 °C req. 4 minutes). Antioxidant characterization of the product are used to determine the effect of thermal processes on the functional character of the product. Pasteurized product at 65 °C has the highest total phenolic content (58.19 mg GAE/ g sample) and antioxidant activity (IC50 0.38 g/mL). The highest total chlorophyll content is pasteurized product at 85 °C (17.21 mg/ 100 g sample). Each product doesn’t show any significant difference in crude fiber content. Based on it functional characteristic, pasteurized product at 65 °C is product that undergo optimal pasteurization process.