微波消解-石墨炉原子吸收法测定滩涂中的铅和镉  

Determination of lead and cadmium in mudflat by GFAAS with microwave digestion

作　　者：龚文杰[1] 许坚[1] 吴建根[1] 韩小江[1] 徐毅[1] 

机构地区：[1]浙江省慈溪市疾病预防控制中心,浙江慈溪315300

出　　处：《中国卫生检验杂志》2012年第3期459-460,463,共3页Chinese Journal of Health Laboratory Technology

基　　金：慈溪市科技计划项目(CN2010009)

摘　　要：目的:建立滩涂中铅和镉的微波消解-石墨炉原子吸收光谱测定方法。方法:以磷酸二氢铵-硝酸镁作基体改进剂,采用硝酸-氢氟酸进行微波消解,利用塞曼扣背景,石墨炉原子吸收法测定滩涂中的铅和镉含量。结果:铅和镉分别在2.0μg/L～50.0μg/L和0.2μg/L～5.0μg/L范围内具有良好的线性,相关系数大于0.999,加标回收率为90%～103%,RSD均小于5.0%。结论:建立的方法具有简便、灵敏、准确的特点,适合于高盐滩涂中铅镉的测定。Objective： To establish a method for determination of lead and cadmium in mudflat by graphite furnace atomic absorption spectrometry with microwave digestion.Methods： The mudflat samples were digested with HNO3-HF.The samples were analyzed by Zeeman GFAAS using NH4H2PO4–Mg（NO3）2 as matrix modifiers.Results： The linear range of the method were 2.0 μg/L^50.0 μg/ml for Pb,and 0.2 μg/L^5.0 μg/L for Cd with the correlation coefficients greater than 0.999.The recoveries were between 90%~103%,both RSDs were less than 5.0%.Conclusion： This method is simple,accurate and sensitive and suitable for determination of lead and cadmium in high salty mudflat.

关 键 词：石墨炉原子吸收法 微波消解 滩涂 铅 镉 

分 类 号：O657.31[理学—分析化学]