固体进样-石墨炉原子吸收法测定沙棘维生素P粉中铅含量  

Determination of Pb in Sea buckthorn vitamin P powder by solid sampling graphite furnace atomic absorption spectrometry

作　　者：张荣 姬丁坤[2] 郭庆斌 

机构地区：[1]青海出入境检验检疫局,西宁810000 [2]青海大学化工学院,西宁810000

出　　处：《现代仪器》2012年第5期68-71,共4页Modern Instruments

基　　金：国家质检总局科技计划项目(编号2011IK219)

摘　　要：本研究采用直接固体进样-石墨炉原子吸收法（SS-GF AAS）测定沙棘维生素P粉中重金属铅的含量。通过对石墨炉工作程序的优化,同时采用基体改进剂技术,最终得到稳定而准确的结果,其结果与液体进样使用ICP-MS测量结果一致。本方法中RSD 2.29%-11.70%,回收率91.75%-114.05%,检出限0.0075ng。与湿法消解方法相比较,该方法无需样品前处理,具有简便、快速特点,同时可避免样品的稀释以及试剂的交叉污染带来的分析误差。Direct solid sampling graphite furnace atomic absorption spectrometry（SS-GF AAS） was used to determine Pb in sea buckthorn Vitamin P powder.After the program optimization and with an extremely careful selection of chemical modifier,the stable and accurate results could be obtained.The same results could finally be carried out by ICP-MS using liquid sampling.The RSD was between 1.23%~11.75%,the recovery rate was between 90.50%~106.13%%,the detection limit was 0.0035ng.Compared with liquid sampling graphite furnace AAS analysis,the Direct SS-GF AAS proved to be a good alternative to conventional methods of trace analysis after wet-chemical digestion and compared favorably with these methods,it can save a lot of work for sample processing,has benefits to avoid dilution and external contamination.

关 键 词：固体进样分析 石墨炉原子吸收法 沙棘维生素P粉 铅(Pb) 

分 类 号：O657.3[理学—分析化学]