Study of application of 60Co- γ irradiation in degradation of four Sudan red dyes and two veterinary drugs residues in foods

The effects of radiation dose on the degradation rate of 3- methyl- quinoxaline- 2- carboxylic acid( MQCA),chloramphenicol and SudanⅠ^Ⅳ were studied.60Co- γ ray at different radiation doses( 0 ~10 k Gy) was applied for the foods of animal origin contaminated with residues.The results showed that60Co- γ irradiation could significantly degrade MQCA in chicken and Sudan Ⅰ~ Ⅳ in egg liquid.When the radiation dose was 9 k Gy,the degradation rates were up to 99.0% and 83.5% ~ 95.7%,respectively.The degrading effect of sudan Ⅰ~ Ⅳ in egg powder were not obvious,the degradation rates were only 9.3% ~ 22.3%. And the degradation of chloramphenicol was 75.3%.To all of them,the degradation rate went up with the increase of radiation dose.This study showed that irradiation treatment was effective to degrade some compounds in foods.