渔业海水中铅的快速定量检测方法

Quantitative test method for rapid determination of lead in fishery seawater

中文关键词: 海水重金属  铅  快速检测  溶出伏安法  导电炭黑糊电极

英文关键词: Heavy metals in seawater  Lead  Fast determination  Anodic striping voltammetry  Conductive carbon black paste electrode

中文摘要:

      以导电炭黑糊电极（CCBPE）为工作电极，建立了海水中重金属铅的阳极溶出伏安检测新方法。实验研究了支持电解质种类、pH、富集电位、富集时间、干扰物质等相关影响参数。结果表明，在最优条件下铅的检测限为0.1 μg/L。据之建立了海水中重金属铅的快速检测方法，并将其应用于青岛近海渔业海水样品中铅含量的检测。检测结果与原子吸收光谱法所测结果一致，表明这种操作简单、快速、免汞、低费用的检测模式具有潜在的应用价值。

英文摘要:

      A new method for rapid determination of lead in fishery seawater was developed by using highly sensitive conductive carbon black paste electrode (CCBPE) as the working electrode. CCBPE showed many attractive electroanalytical properties, such as low background current, large electrochemical active area, good accumulation ability and so on. The heavy metal lead showed sensitive response at the CCBPE with anodic stripping voltammetry mode. Some important factors, including the supporting electrolyte, pH, accumulation potential, accumulation time, interference substances, etc. were studied. Under the optimized conditions, a detecting limit of 0.1 μg/L was obtained. Based on the results, a new method for determining lead in seawater was developed. The new method was used to determine the lead concentration in real seawater samples collected from nearshore site in Qingdao. It was found that the test data were in good agreement with that obtained by atomic absorption spectrometry, indicating that the simple, rapid, mercury-free and cost-effective method had a great potential value for application.