用清除羟自由基法评价竹叶提取物抗氧化能力

进行了Fe2+与邻二氮菲生成红色配合物的吸收光谱，抗氧化剂TBHQ及竹叶提取物样品对清除羟自由基能力的研究。分光光度法测定抗氧化剂清除羟自由基能力的测定波长为509.1 nm。以IC₅₀值(清除率为50%时，抗氧化剂的浓度值)作为评价抗氧化剂清除羟自由基能力的指标，测得合成抗氧化剂和效果最好竹叶提取物样品IC₅₀值分别为0.040(TBHQ)，0.378(M20)，0.323(M40)，0.334(M60)，M20, M40, M60等竹叶提取物可以作为天然抗氧化剂进行开发。

Detection of Antioxidative Capacity of Bamboo Leaf Extract by Scavenging Hydroxyl Free Radical

By studying on absorption spectrum of red compound coming from the reaction system of Fe2+ and 1,10-phenanthroline and the capacity of antioxidant TBHQ and bamboo leaf extract for scavenging hydroxyl free radical,some results were drawn as follows: the determining wavelength of bamboo leaf extract for scavenging hydroxyl free radical by spectrophotometric method is 509.1 nm,and IC50(the value of antioxidant concentration at scavenging half of hydroxyl free radical)was used as the index to evaluate scavengin...