石墨炉原子吸收法测定食品中的铝

Determination of aluminum in provisions by GFAAS

目的:建立一种适用日常、准确检测食品中铝的分析方法。方法:采用干法灰化消化,以K2Cr2O7为基体改剂,优选波长,干燥、灰化、原子化温度,建立工作曲线,对样品进行测定。结果:在0～800.0μg/L线性范围内,相关系数:R=0.9996,检出限:3.2μg/L加标回收率:92.1%～104.8%,相对标准偏差(RDS)均小于5%。结论:该方法操作简便、灵敏度高、回收率好、结果准确、可作为日常大批量食品中铝分析方法。

Objective：Establish an applicable daily and accurate detection of provisions for aluminum method.Methods：Use dry ash of digestion,with K2Cr2O7 for Matrix modifier,the optimal wavelength,dry,grey melt,the atomic transition temperature,establish the curve,the determination of the samples.Results：In 0 ～ 800.0 ug/L linear range,the correlation coefficient： R=0.9996.The inspection methods： 3.2 μg/L,the recovery rate of： 92.1%～104.8%,relative standard deviation（RDS） are less than 5%.Conclusion： This method is easy to operate,high sensitivity,recovery,and good results are accurate and which can be used as daily mass provisions stacking-type analysis method.