摘要
目的建立微波消解-电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)测定面制食品中Al元素含量的方法。方法面制食品样品经微波消解后,使用ICP-MS测定,并对方法的线性范围、检出限、精密度和回收率等进行考察。结果 Al元素在20.0~200.0μg/kg范围内的相关系数大于0.999,线性良好,方法检出限为0.2μg/kg,定量限为0.6μg/kg。加标浓度为5.0~15.0μg/kg时,回收率在99.3%~105.0%之间,且相对标准偏差(relative standard deviation,RSD)在0.93%~2.11%之间。结论该检测方法简单、快速、准确、灵敏度高,适用于面制食品中Al元素的测定。
Objective To establish a method for determination of aluminum element in flour products by microwave digested-inductively coupled plasma mass spectrometry(ICP-MS). Methods Flour products were detected by ICP-MS after microwave digestion, and the linear relation, accuracy, precision and quantitative limit of the method were investigated. Results The method showed good linearity in the range of 20.0-200.0 μg/kg and the correlation coefficient of aluminum element was greater than 0.999. The limit of detection was 0.2 μg/kg, and the limit of quantification was 0.6 μg/kg. The recoveries at spikes of 5.0-15.0 μg/kg were 99.3%-105.0%, with the relative standard deviations(RSD) were 0.93%-2.11%. Conclusion This method is simple, rapid, accurate and sensitive, which is suitable for the determination of aluminum element in flour products.
引文
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