伏安极谱仪测定海水中活性态痕量金属

Determination of Labile Trace Metals in Seawater by Voltammetric Polarograph

阳极溶出伏安法是一种可以直接用于海水中痕量金属元素检测分析的有效方法,不仅能够实现多元素同时检测,而且不需要样品预浓缩处理.通过伏安极谱仪,研究了富集电位和富集时间等关键参数对阳极溶出伏安法测定痕量金属铜、铅、镉、锌的影响,对过滤后的海水样品直接进行检测,实现了烟台四十里湾不同站位海水中活性态痕量金属铜、铅、镉、锌的测定,为海水中痕量金属元素的形态分析及生物可利用性研究提供了有效技术手段.

Anodic stripping voltammetry is an effective method for the direct determination of trace metal elements in seawater without the need for sample pre-concentration treatment,which can achieve the simultaneous determination of multiple elements.The effects of critical parameters such as accumulation potential and time on the determination of copper,lead,cadmium and zinc by anodic stripping voltammetry were studied through a voltammetric polarograph.The filtered seawater samples collected from different sites of Yantai Sishili Bay were determined directly for the analysis of labile trace metals of copper,lead,cadmium and zinc.It provides an effective technique for the speciation analysis and bioavailability study of trace metal elements in seawater.