Antioxidant activity of lycopene extracted from tomato paste towards trichloromethyl peroxyl radical CCl3O2

作者：Zhao, YP^*; Qian, SP; Yu, WL; Xue, Z; Shen, H; Yao, SD; Wang, DP

来源：Food Chemistry, 2002, 77(2): 209-212.

• antioxidant
• lycopene
• trichloromethyl peroxyl radicals
• pulse radiolysis

The objectives of this paper were to evaluate the antioxidant activity of lycopene towards the trichloromethyl peroxyl radical (CCl3O2.) and to obtain a precise rate constant using a pulse radiolysis technique. Lycopene was extracted and purified from tomato paste and its purity reached 95.0% (HPLC analysis). CCl3O2. was generated from a pulsed aqueous air-saturated solution of 2-propanol (2 M), acetone (1 M) and CCl4 (10(-2) M). The observed spectrum showed an intense bleaching of the lycopene ground-state absorption in the region 350-450 nm and the bleaching rate constant was determined to be 1.17 x 10(9) M(-1)s(-1), which indicated a rapid interaction between lycopene and CCl3O2..

• 出版日期2002-5
• 单位中国科学院; 上海交通大学