The Electron Donating Ability, Nitrite Scavenging Ability and NDMA Formation Effect of Solvent Extracts from Yuza (Citrus junos SIEB ex TANAKA)

Methanol, ether, ethylacetate and water extracts from flesh and peel of yuna (Citrus junos) were investigated to analyze their ability of electron donating, nitrite scavenging and nitrosodimethylamine (NDMA) formation in model system. The electron donating ability of ynza flesh extract, when it added at 10 mg/ml or over, were more an , except ether extract. The high electron donating ability () was observed in the methanol extract and its effect was similar to BHA and ascorbic acid, when 40 mg/ml of methanol extract was added in reaction solution. Nitrite scavenging ability of all extracts ken yuza was increased in proportion to sample concentration and more than when 1 mg/ml sample was added, under pH 1.2. Also nitrite scavenging ability was higher in peel extracts than flesh extracts of yuza. Inhibition ratio of NDMA formation from flesh methanol extract of yuza was , when 40 mg/ml added under pH 1.2. In all samples, inhibition effects were lower than , at pH 4.2 and 6.0.