ICP-OES法测定挂面、粉条和膨化食品中的铝

Determination of aluminum in noodles,vermicelli and puffed food by ICP-OES

目的:建立挂面、粉条和膨化食品中铝的电感耦合等离子发射光谱(ICP-OES)检测方法。并了解此三类食品中铝的含量。方法:样品经湿式消解后,用电感耦合等离子体发射光谱法进行测定,外标法定量。结果:方法最低检出限为0.024μg/ml,最低检出浓度0.600 mg/kg;在0.200μg/ml～50.0μg/ml范围内呈线性关系,相关系数r=0.9999,回收率在91.9%～106.7%之间;测定结果相对标准偏差为0.88%～3.06%。测定的三类食品中粉丝铝含量最高,膨化食品其次,挂面最低。结论:方法操作简便准确、干扰小、检出限低、线性范围广,适用于食品中铝的测定。

Objective：To establish a determination method of aluminum in noodles,vermicelli and puffed food by Inductively Coupled Plasma Optical Emission Spectroscopy（ICP-OES）,and find out the levels of aluminum in these foods.Methods：The samples were wet digested,analyzed by ICP-OES and quantified by external standard.Results：The lowest detection limit was 0.024 μg/ml,the lowest detectable concentration of 0.600 mg/kg;The linear range of the method was 0.200 μg/ml～50.0 μg/ml with a correlation coefficient of 0.9999.The recovery rate and relative standard deviation were 91.9%～106.7%,0.88%～3.06%,respectively.In the three detected foods,the level of aluminum was highest in vermicelli,with puffed food next and finally noodles.Conclusion：The method is simple,accurate,low interference,low detection limit,wide linear range for determination of aluminum in food.