六极杆碰撞反应池-ICP-MS法测定海水中痕量金属元素
卢水淼,邱明,李剑,梁炎,李鹰,马放均
聚光科技(杭州)股份有限公司,杭州 310000
Determination of Trace Elements in Seawater by Inductively Coupled Plasma-Mass Spectrometry Based on Hexapole Collision/Reaction Cell Techniques
卢水淼,邱明,李剑,梁炎,李鹰,马放均
Focused Photonics (Hangzhou), Inc, Hangzhou 310000, China
摘要:建立了直接稀释法测定海水中痕量金属元素Cr,Cu,Zn,Cd,Pb的方法。样品经稀释10倍后,使用基体匹配及内标校正,采用六极杆碰撞反应池-电感耦合等离子体质谱仪直接测定稀释后海水样品中的5种元素Cr,Cu,Zn,Cd,Pb。各元素在0.0~100 μg/L范围内均呈现良好的线性关系,线性相关系数(r2)均大于0.9990,方法检出限为0.004~0.209 μg/L。测定结果的相对标准偏差为2.4%~4.4%(n=6),加标回收率为92%~113%。该方法简单快捷,适用于近岸海水中痕量元素Cr,Cu,Zn,Cd,Pb的分析。
Abstract:The method for determination of trace metal elements(Cr, Cu, Zn, Cd, Pb) in seawater was established. After the sample of seawater was diluted 10 times, Cr, Cu, Zn, Cd, Pb in seawater were directly determined by using the matrix matching, internal standard calibration, and inductively coupled plasma mass spectrometry combined with the kinetic energy collision pool mode of screening technology. The linear correlation coefficient (r2) of each element was more than 0.9990 in the range of 0.0-100 μg/L with good linear relationship. The detection limit of the method was 0.004-0.209 μg/L, the precision of the method was 2.4%-4.4%(n=6), the recovery of standard adding was 92%-113%. The method is simple and quick, which can be used for the analysis of trace metal elements Cr, Cu, Zn, Cd, Pb in seawater.
关键词:电感耦合等离子体质谱法;痕量元素;基体匹配;海水;六极杆碰撞反应池
Keywords:ICP-MS; trace element; matrix matching; seawater; hexapole collision reaction cell
基金:国家重点研发计划“重大科学仪器设备开发”重点专项
本文引用格式:
卢水淼,邱明,李剑,等.六极杆碰撞反应池-ICP-MS法测定海水中痕量金属元素[J].化学分析计量,2016,25(6):13-16.
Lu Shuimiao,Qiu Ming,Li Jian,et al.Determination of Trace Elements in Seawater by Inductively Coupled Plasma-Mass Spectrometry Based on Hexapole Collision/Reaction Cell Techniques[J]. Chemical analysis and meterage,2016,25(6):13-16.
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