石墨消解-电感耦合等离子体质谱法测定烟叶中12种微量元素  

Determination of 12 Minor and Trace Elements in Tobacco by Graphite Digestion-ICP-MS

作　　者：邓杰[1] 戴林建[1] 杨苏[1] 周田[1] 

机构地区：[1]湖南农业大学农学院,湖南长沙410128

出　　处：《热带作物学报》2017年第9期1759-1763,共5页Chinese Journal of Tropical Crops

基　　金：湖南中烟工业有限责任公司资助项目(No.YC14014)

摘　　要：采用石墨消解-电感耦合等离子体质谱法(ICP-MS)同时测定烟叶中硼(B)、钛(Ti)、铬(Cr)、锰(Mn)、镍(Ni)、铜(Cu)、砷(As)、硒(Se)、钼(Mo)、镉(Cd)、铯(Cs)、钡(Ba)12种微量元素。样品的前处理采用硝酸和过氧化氢混合溶液,通过石墨消解仪进行消解,建立了一种新的前处理消解方法。用此检测体系对来自湖南湘西3个地区的烟叶样品进行了测定,研究并发现了以上微量元素随产地、部位的不同而在烟叶中存在一定的含量差异。该方法相对标准偏差:1.25%~8.93%,回收率:93.07%~104.75%,适用于烟叶中多种微量元素含量的测定。A method for the determination of B, Ti, Cr, Mn, Ni, Cu, As, Se, Mo, Cd, Cs, Ba in tobacco by ICP-MS with graphite digestion was studied. A new graphite digestion method was used in the pretreatment of the samples,decomposed in a mixture of HNO3 and H2O2. In this paper, the samples of tobacco produced in three tobacc-o zones of Xiangxi, Hunan were determined. The results indicated that the level of elemental content in tob-acco varies according to region and stalk positions.The relative standard deviation was 1.25%-8.93% and the recoveries for the spiked standards ranged from 93.07% to 104.75%. This method is suitable for the determination of minor and trace elements in tobacco.

关 键 词：石墨消解 电感耦合等离子体质谱 烟叶 微量元素 

分 类 号：O657[理学—分析化学]