微波消解-原子吸收法测定干香菇中镉  

Determination of cadmium in the dry mushrooms by microwave digestion-atomic absorption spectrometry

作　　者：曹惠君[1] 陈素军[2] 

机构地区：[1]北京市西城区疾病预防控制中心,北京100120 [2]北京丰台区疾病预防控制中心,北京100071

出　　处：《中国卫生检验杂志》2013年第4期853-854,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的:建立一种快速准确的微波消解-原子吸收法用于测定干香菇中镉的含量。方法:采用微波消解对样品进行前处理,应用石墨炉原子吸收法,以磷酸二氢铵作为基体改进剂测定干香菇中镉的含量。结果:通过正交设计,在优化的最佳消解和反应检测条件下,镉浓度范围在0μg/L～5μg/L内线性关系良好,相关系数为0.9998,检出限为0.036μg/L,样品的相对标准偏差(RSD)为6.6%,加标回收率为92.0%～95.0%。结论:该方法简便快速、准确灵敏,适用于干香菇中镉的含量.Objective：To establish a rapid and accurate microwave digestion-atomic absorption method to measure the content of cadmium in dry mushrooms.Methods： After sample pretreatment by microwave digestion,the content of cadmium in dry mushrooms was measured by graphite furnace atomic absorption method with ammonium dihydrogen phosphate as matrix modifier.Results： Based on the orthogonal design,the optimization of the best resolution and response testing conditions,cadmium showed good linearity in the concentration range of 0 μg/L^5 μg/L,the correlation coefficient was 0.9998,the detection limit was 0.036 μg/L,relative standard deviation（RSD） was 6.6%,the labeled recovery is 92.0%~95.0%.Conclusion： This method is simple,rapid,accurate and sensitive,it is suitable for detection of cadmium level in dry mushrooms.

关 键 词：微波消解 原子吸收法 干香菇 镉 

分 类 号：O657.31[理学—分析化学]