丙烯酰胺水溶液的辐照消减效应研究

Study on irradiation reduction effect of acrylamide aqueous solution

目的探讨食品中已生成的丙烯酰胺原位消减技术。方法采用^(60)Co-γ对丙烯酰胺水溶液进行辐照处理,研究初始浓度、吸收剂量及添加HCl、Na_2CO_3、H_2O_2、VC、叔丁醇等对丙烯酰胺含量随吸收剂量变化规律。结果丙烯酰胺含量随吸收剂量的升高而显著降低, 3 kGy以上剂量照射后,丙烯酰胺的降解率在99%以上; Na2CO3可促进丙烯酰胺的辐照降解; H_2O_2、HCl起抑制作用;低剂量下HCl及叔丁醇能促进丙烯酰胺的降解,高剂量下则起抑制作用;红外研究(infrared ray, IR)表明辐照生成无毒的聚丙烯酰胺。结论辐照可有效地降解溶丙烯酰胺, Na_2CO_3可以作为其辐照增效剂。

Objective To explore the in-situ degradation of acrylamide generated in food. Methods Irradiation treatment of acrylamide aqueous solution was performed by ^（60）Co-γ, and initial concentration, absorbed dose and the variation of acrylamide content with the absorbed dose by adding HCl, Na_2 CO_3, H_2 O_2, VC and tert-butanol were studied. Results The content of acrylamide decreased significantly with the increase of the absorbed dose, and the degradation rate of acrylamide was more than 99% after irradiation above 3 kGy. Irradiation degradation of acrylamide could be promoted by Na_2 CO_3, on the contrary inhibited by H_2 O_2 and HCl. Under low radiation doses, HCl and tert-butanol alcohol could promote acrylamide degradation, and inhibit it at higher radiation doses. Infrared ray（IR） results showed that nontoxic polyacrylamide was produced after irradiation. Conclusion Irradiation can effectively degrade acrylamide, and Na_2 CO_3 can be used as an irradiation synergist.