The paper reports the method applieable for determination of traces of mercury in 2.0mol·L -1 HCl 1.5 mol·L -1 NaCl 1.0μg·ml -1 Cd 2+ medium with differential pulse anoldic stripping voltammetry.Stripp...The paper reports the method applieable for determination of traces of mercury in 2.0mol·L -1 HCl 1.5 mol·L -1 NaCl 1.0μg·ml -1 Cd 2+ medium with differential pulse anoldic stripping voltammetry.Stripping peak and concentration of Hg is linear in range of 0.50～100ng·ml -1 when the deposition time is 5min.The relative standard deviation of 4.0ng·ml -1 Hg 2+ is 8.87% while n=8.After enrichment and separation of Hg in synthetic samples is obtained by using a microcolumn of sulfhydry cotton,the average recovery is about 80%.展开更多
文摘提出并设计了一种新型的全自动电化学分析系统。该系统在虚拟仪器(L abv iew)的软件平台上,构架了由IEEE 488PC I-GP IB卡、多功能DAQ卡(PC I-6035E)、GP IB程控电源(E 3631A)、低噪声电流放大器(M ode l SR 570)、双通道滤波器(M ode l SR 650)等仪器组成的硬件测试平台,并建立开发了一套完整的控制和分析软件,实现了电化学分析中进样、加标、富集、扫描、清洗和分析等过程的全自动化。以微分脉冲溶出伏安法(DPSV)检测海水中4种痕量的重金属元素(Cu2+、Cd2+、Zn2+、Pb2+)为例,详细介绍了测试分析的实现过程。该测试平台不仅易于研究电化学分析中的各种检测方法和数据分析方法,而且为研发适于现场监测的全自动电化学分析测试方案提供了良好的平台。
文摘The paper reports the method applieable for determination of traces of mercury in 2.0mol·L -1 HCl 1.5 mol·L -1 NaCl 1.0μg·ml -1 Cd 2+ medium with differential pulse anoldic stripping voltammetry.Stripping peak and concentration of Hg is linear in range of 0.50～100ng·ml -1 when the deposition time is 5min.The relative standard deviation of 4.0ng·ml -1 Hg 2+ is 8.87% while n=8.After enrichment and separation of Hg in synthetic samples is obtained by using a microcolumn of sulfhydry cotton,the average recovery is about 80%.
