甘肃省市售浆水中亚硝酸盐含量测定

Nitrite content and safety evaluation of Jiangshui purchased from markets in Gansu

目的了解甘肃省市售浆水中亚硝酸盐的含量。方法对GB5009.33—2010《食品中亚硝酸盐与硝酸盐的测定》方法做了改进,省略了沉淀蛋白质的步骤;并按照改进的方法测定了采集于2013年4月至8月的62份浆水样品中亚硝酸盐的含量。结果 62份样品中亚硝酸盐含量均低于2 mg/kg,平均亚硝酸盐含量为0.64 mg/kg;含菜浆水亚硝酸盐含量高于不含菜浆水。结论依据GB 2762—2012《食品中污染物限量》中规定的蔬菜及其制品、腌渍发酵蔬菜中亚硝酸盐最大量为20 mg/kg,62份样品中亚硝酸盐含量均未超标。

Objective To investigate the nitrite content of Jiangshui purchased from markets in Gansu. Methods Improvements had been made to the GB 5009.33-2010 method for determination of nitrite and nitrate in food, and the protein precipitation step was skipped. 62 samples, collected from April to August 2013, were detected using the modified method of GB 5009.33-2010. Results Nitrite contents of 62 samples were lower than 2 mg/kg, and the average content was O. 64 mg/kg. Nitrite content of Jiangshui containing vegetables were higher than those not. Conclusion On the basis of the national food safety standards for food contaminants （GB 2762-2012）, the limit of nitrite in vegetables, their products and pickled vegetables was 20 mg/kg, and the 62 samples didn＇t exceed the standard.