Abstract:
The objectives of this research were 1) to study the antioxidant efficiency of Feronia limonia Swingle branch crude extract, 2) to separate and to study the chemical compound of Feronia limonia Swingle branch crude extract as an antioxidant, 3) to develop lotion product with Feronia limonia Swingle branch crude extract as an antioxidant and to test some of physical and chemical properties of lotion product and 4) to develop the practical training in conclusion related with the crude extract from Feronia limonia Swingle branch in the lotion product. The dried and grinded branches of Feronia limonia Swingle were macerated with ethanol to obtain the crude extract. Then, the total phenolic and tannin contents were analyzed from the crude extract using Ultraviolet-Visible Spectrophotometer. The antioxidant activities of crude extract were studied by DPPH Radical technique. The separation of Feronia limonia Swingle branch crude extract was done by column chromatography. The highest antioxidant activity fraction was analyzed the chemical components by Gas Chromatography-Mass Spectrometry. Then, the fraction was further used to make a lotion product. Some physical and chemical properties of a lotion product were focused such as color, odor, the homogeneous of lotion and pH value. The knowledge gained from the study was used to develop the practical training in conclusion related with the crude extract from Feronia limonia Swingle branch in the lotion product for 30 students. The survey of the satisfaction with training and the comparison of the knowledge before and after training was carried out. The results showed as follows: 1) The crude extract from Feronia limonia Swingle branch contained the total phenolic and tannin contents at 41.99 µg/mL and 52.35 µg/mL, respectively and the antioxidant activity (IC50) was 12.55 µg/mL. In addition, the antioxidant values (IC50) of BHT and BHA were 8.96 and 9.61 µg/mL, respectively. 2) The separations of Feronia limonia Swingle branch crude extract were divided into 4 groups including F1, F2, F3 and F4 and the results found that the F2 group had the highest antioxidant activity at 9.53 µg/mL. The F2 fraction was then analyzed with Gas Chromatography-Mass Spectrometry. The results revealed that the major chemical compositions in crude extract were Hexadecanoic Acid; Ethyl Ester, Trimethylsilyl Ester and Dioctyl Ester. 3) The lotion product containing Feronia limonia Swingle branch crude extract had the white color, odorless, and homogeneous at pH value of 8. 4) The practical training had an Index of Congruence more than 0.5. The comparisons of the knowledge of the trainees before and after the training were different with the statistical significance at 0.01 level. The satisfaction with training was at a high level. ( = 4.45, S.D. = 0.58)