The antioxidant properties of lycopene concentrate extracted from tomato paste

Lycopene concentrate (LC) containing 50 wt% lycopene was extracted from tom ato paste. The antioxidant properties of LC were evaluated by means of chem iluminescence in four models. The four models were superoxide anions genera ted from pyrogallol autoxidation, hydroxyl radicals from Fenton reaction, s inglet oxygens from OH--NaClO-H2O2, and lipid peroxidation from 2,2 ' -azob is(2-amidinopropane)dihydrochloride-induced gamma -linolenic acid. LC was a n effective scavenger toward superoxide anions, hydroxyl radicals, and sing let oxygens, and also it could effectively reduce lipid peroxidation. The 5 0% efficient concentrations (EC50) toward superoxide anions, hydroxyl radic als, lipid peroxidation and singlet oxygen were 0.75, 0.05, 0.1, and 1 mg/m L, respectively. In addition, changes of antioxidant behaviors with time we re investigated. The time requirements of LC for effectively scavenging sup eroxide anions, hydroxyl radicals, and inhibiting lipid peroxidation were n ot higher than 6, 6, and 18 s, respectively.