浅谈ICP-MS法同时测定水质中十种重金属元素

摘要

建立了ICP-MS同时测定地表水中硒、铁、镍、铊、钡、钒、铍、铅、铬、铜等多种重金属元素含量的方法.水样经预处理后进行蒸发、解离、原子化、电离等过程进入MS部分, 通过高速顺序扫描分离测定所有离子, 根据离子的质荷比进行分离并定性、定量分析.结果表明, 10种重金属元素线性相关系数均大于0. 999, 标准偏差均在5％以内, 加标回收率在80％110％之内.该法操作简便快速、线性好、灵敏度高, 结果准确可靠, 是测定地表水中重金属元素的理想方法.%A method for simultaneous determination of various heavy metal elements such as selenium, iron, nickel, strontium, barium, vanadium, niobium, lead, chromium and copper in surface water by ICP-MS was established. After pretreatment, water samples were evaporated, dissociated, atomized and ionized into MS, Separating all ions by high speed sequential scanning.According to the mass charge ratio, we do qualitative and quantitative analysis. Results show that the linear correlation coefficients of 10 heavy metal elements are all greater than 0. 999. Standard deviation is within 5％ and the standard recovery rate is within 80％～ 110％. This method is simple, rapid, linear, sensitive, accurate and reliable and it's an ideal method for determining heavy metal elements in surface water.