摘要:
建立了一种在线进样技术,包括在线稀释和在线预浓缩两种模式,电感耦合等离子体质谱法( ICP-MS)直接测定海水中Cr, Mo, Cu, Pb, Zn, Cd, Fe, Mn, Ni, V, Co等11种痕量重金属的分析方法。此方法可自动稀释制作标准曲线,自动基体匹配,通过在线稀释及在线预浓缩两种模式,直接分析海水中11种痕量重金属。方法自动化程度高,分析CASS-5和NASS-6海水标样,结果准确。实际海水样品加标回收率范围为80%~115%。海水中11种金属元素的方法定量限(μg/L)分别为0.06(Cr),0.06(Mo),0.01(Cu),0.005(Pb),0.01(Zn),0.006(Cd),0.03(Fe),0.02(Mn),0.01(Ni),0.01(V),0.01(Co)。方法被用于分析浙江沿海不同盐度海水样品重金属分析,分析结果与传统原子吸收方法结果一致。