【摘要】 目的建立测定污水中Pb和Cd的新方法。方法于0.1mol/LHCl～0.1moL/LKCl溶液中采用线扫阳极溶出伏安法同时测定Pb和Cd。结果Pb、Cd于-588mV和-780mV产生溶出峰,Pb、Cd加标回收率P%分别为90.0%～110.0%和91.0%～109.5%,测定精密度RSD%分别为0.41%～4.24%和0.56%～7.03%,Pb、Cd的线性范围为0.005～0.2mg/L。结论该法可用于污水中Pb、Cd含量测定。更多还原

【Abstract】 Objective To establish a new method for determination of Pb and Cd in sewage.Methods The contents of Pb and Cd in sewage were simultaneously determined by linear sweep anodic stripping voltammetry in0.1mol/L HCl -0.1mol/L KCl solution.Results The peak potentials of Pb and Cd appeared at-588mV and-780mV respectively.The recovery rates and precisions(RSD%)of Pb and Cd were90.0%-110.0%,91%-109.5%and0.41%-4.24%,0.56%-7.03%respectively.The lin-ear range of Pb and Cd was0.005-0.2mg /L.Conclusion This method could be applied for determination of Pb and Cd in sewage.更多还原