动态反应池-电感耦合等离子体质谱法测定烟草中的砷  

Determination of Arsenic in Tobacco by ICP-MS with Dynamic Reaction Cell

作　　者：朱书秀[1] 陆明华[1] 斯文[1] 林垦[1] 汤晓东[1] 

机构地区：[1]浙江中烟工业有限责任公司技术中心,杭州310024

出　　处：《理化检验（化学分册）》2015年第9期1260-1262,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：建立了一种测定烟草中痕量砷的电感耦合等离子体质谱（ICP-MS）分析方法。样品用硝酸-过氧化氢经微波消解前处理后,采用ICP-MS动态反应池模式,以氧气为反应气,通过测定^75 As^16 O^＋对砷进行定量。砷的质量浓度在20μg·L^-1范围内呈线性,方法的检出限（3S/N）为39ng·L^-1。方法用于烟叶样品分析,加标回收率在95.3%~105%之间,测定值的相对标准偏差（n=7）小于5.0%。A method of ICP-MS was developed for the determination of trace Arsenic in tobacco.The sample was pretreated by microwave digestion in a mixture of nitric acid and hydrogen peroxide.The ^75 As^16 O^＋was measured by ICP-MS using a dynamic reaction cell mode with oxygen as the reaction gas.Then the content of arsenic in the sample was quantified.The linearity range of the mass concentration of arsenic was below 20μg·L^-1with the detection limit of 39ng·L^-1.The method was used to measure arsenic in tobacco,giving recovery rates in the range of 95.3%-105% and RSD（n=7）less than 5.0%.

关 键 词：电感耦合等离子体质谱法 砷 动态反应池 氧气 

分 类 号：O657.63[理学—分析化学]