6种热带水果多酚组成及其抗氧化活性分析

摘要

对6种热带水果的游离酚和结合酚含量、单体酚组成和抗氧化活性进行了研究.结果显示:6种水果的游离酚含量为36.20 mg GAE/100 g ~342.85 mg GAE/100 g鲜重,结合酚含量为0.80 mg GAE/100 g ~23.19 mg GAE/100 g鲜重.在6种水果的游离酚中,杨桃的苯甲酸(6.63 ± 0.48)mg/100 g FW、鞣花酸(4.47 ± 0.10)mg/100 g FW含量较高,龙眼的没食子酸(10.71 ± 0.37)mg/100 g FW含量较高,柠檬的芦丁(9.34 ± 0.43)mg/100 g FW、高香草酸(6.65 ± 0.35)mg/100 g FW和香草酸(4.82 ± 0.29)mg/100 g FW的含量较高;在结合酚中,番石榴的芦丁(2.28 ± 0.02)mg/100 g FW、鞣花酸(1.69 ± 0.14)mg/100 g FW和苯甲酸(1.44 ± 0.10)mg/100 g FW的含量较高,杨桃的原儿茶酸(3.07 ± 0.50)mg/100g FW含量较高.6种水果游离酚和结合酚的DPPH自由基清除值分别为261.07 μmol TE/100 g FW~3561.12 μmol TE/100 g FW和4.59 μmol TE/100 g FW~110.90 μmol TE/100 g FW;ABTS+自由基清除值分别为48.74 μmol TE/100 g FW~240.72 μmol TE/100 g FW 和2.22 μmol TE/100 g FW~135.87 μmol TE/100 g FW.本研究可以为我国热带水果的开发利用提供依据.%The content of free phenol and bound phenol,the composition of mono-phenols and the antioxidant activity of six tropical fruits were evaluated.The free and bound phenolic contents of the six fruits were 36.20 mg GAE/100 g-342.85 mg GAE/100 g and 0.80 mg GAE/100 g-23.19 mg GAE/100 g fresh weight, respectively.For the free phenolics of these six tropical fruits,benzoic acid(6.63 ± 0.48)mg/100 g FW and ellagic acid(4.47 ± 0.10)mg/100 g FW were the major free phenolic of carambola;gallic acid(10.71 ± 0.37) mg/100g FW was comparatively rich in free phenolic of longan;rutin(9.34 ± 0.43)mg/100 g FW,homovanillic acid(6.65 ± 0.35)mg/100 g FW and vanillic acid(4.82 ± 0.29)mg/100 g FW were the major free phenolic in lemon.For bound phenolics,rutin(2.28 ± 0.02)mg/100 g FW,ellagic acid(1.69 ± 0.14)mg/100 g FW and benzoic acid(1.44 ± 0.10)mg/100 g FW were comparatively rich in bound phenolic of guava;protocatechuic acid(3.07 ± 0.50)mg/100 g FW was the major bound phenolic in carambola.The DPPH·scavenging ability of free and bound phenolic of the six fruits were 261.07 μmol TE/100 g FW-3 561.12 μmol TE/100 g FW and 4.59 μmol TE/100 g FW-110.90 μmol TE/100 g FW, respectively. The ABTS+·scavenging capacity were 48.74 μmol TE/100 g FW-240.72 μmol TE/100 g FW and 2.22 μmol TE/100 g FW-135.87 μmol TE/100 g FW.The results can provide the basis for the development and utilization of tropical fruits.