PENENTUAN STRUKTUR SENYAWA ANTIOKSIDAN LIMONOID DARI BIJI JERUK SAMBAL (Citrus microcarpa Bunge) KALIMANTAN BARAT

Setyo Widayanti, R. Rudiyansyah, A. H. Alimuddin
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引用次数: 1

Abstract

Limonoid has been isolated from orange seeds of Citrus microcarpa Bunge using extraction and partitioning methods. It is a yellowish-white crystal with a melting point of 276-277 oC. Based on the phytochemical analysis and FTIR spectroscopy, 1H NMR and compared with the literature, the compound is limonin which is a triterpenoid. The purpose of this study was to determine the structure and evaluate antioxidant activity of the limonin. The antioxidant activity by DPPH obtained IC50 value of limonin was 199.18 ppm. Whereas, the test antioxidant activity by FRAP method using a comparative solution of ascorbic acid showed that there was an increasingly blue color change, which meant that antioxidant activity was stronger with activity value of 11.88 mgAAE /g sample.
采用提取、分离等方法从柑桔种子中分离得到类柠檬素。它是一种黄白色晶体,熔点为276-277℃。经植物化学分析、FTIR光谱、1H NMR及文献比较,该化合物为三萜类化合物柠檬苦素。本研究的目的是测定柠檬苦素的结构并评价其抗氧化活性。DPPH对柠檬苦素的IC50值为199.18 ppm。而用FRAP法测定抗坏血酸对比溶液的抗氧化活性表明,抗坏血酸的颜色变化越来越蓝,表明抗氧化活性更强,活性值为11.88 mgAAE /g样品。
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