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《Spectroscopy and Spectral Analysis》 2008-07
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Detection of Antioxidative Capacity of Bamboo Leaf Extract by Scavenging Organic Free Radical DPPH

GUO Xue-feng, YUE Yong-de, TANG Feng, WANG Jin, YAO XiInternational Centre for Bamboo and Ratten, State Forestry Administration Key Open Laboratory on Bamboo and Rattan Science and Technology, Beijing 100102, China  
By studying on absorption spectrum of DPPH solution and DPPH reaction system, the conclusion was drawn as follows, the wavelength for the determination of DPPH reaction system by spectrophotometric method was chosen to be 518.4 nm, DPPH reaction system was 4.00 mL of 257.7 mg·L-1 DPPH+1 mL of antioxidant solution with the reaction time of DPPH reaction system of 40 min. The relation between DPPH radical scavenging rate and the concentration of TBHQ and BHT was studied, and IC50 (the value of antioxidant concentration for scavenging half of DPPH radical) was used as the index to evaluate scavenging capacity. The determining IC50 values were as follows: TBHQ(21.14 mg·L-1), BHT(42.09 mg·L-1) and M40(108.40 mg·L-1). Bamboo leaf extract could be used as natural antioxidant.
【Fund】: 国家“十一五”科技支撑项目(2006BAD19B08);; 国际竹藤网络中心基本科研业务费专项资金(06/07-B14)资助
【CateGory Index】: R285
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