冷原子吸收汞蒸气发生器的改进及应用

介绍一种用于冷原子吸收光谱分析法测汞的新型的汞蒸气发生器，并探讨了将该发生器与测汞仪配合直接测定水中痕量汞的工作条件。采用该发生器比旧式汞反应瓶测汞操作简单、快速、灵敏度高。     

流体室温磷光法测定痕量钛（Ⅳ）

基于曲拉通X-100和HAc-NaAc(pH=5．9)存在，不除氧条件下，曲拉通X-100能增敏钛(Ⅳ)-4，5-二溴苯基荧光酮流体室温磷光信号的增强效应，建立了曲拉通X-100增敏4，5-二溴苯基荧光酮的超高灵敏度流体室温磷光增强法测定痕量钛(Ⅳ)的新方法。钛(Ⅳ)量为3．2-6．4pg／mL与△Ip值成线性关系，其工作曲线的回归方程△Ip=-31．12 147．2CTi (pg／mL)，r=0．9997，检出限为1．38pg／mL。该方法用于人发和茶叶中钛含量的测定，结果满意。     

原子吸收法测定高纯钛酸钡中的Cu,Fe

本文研究了火焰原子吸收法测定高纯钛酸钡中痕量铜和铁的方法和条件,实验结果表明,该方法准确、可靠,具有一定实用价值。     

Recovery Properties of Polysulfone Hollow Fiber Chelating Membrane Modified with Thiourea for Mercury （ Ⅱ ）

The adsorption isotherms of the polysulfone hollow fiber chelating membrane modified with thionrea as chelating groups for Hg^2＋ were determined. The effects of mobile phase conditions and the operating parameters on removal performance of the chelating membrane for Hg^2＋ were also investigated. The recovery of Hg^2＋ decreased at low pH and the optimum range of pH was from 6 to 7. The feed concentration effected on recovery of Hg^2＋ at the specified loading amount of Hg^2＋. The Hg^2＋ could be removed from different concentration feed solution by chelating membrane. The increase of feed flow rate led to slight decrease of recovery of Hg^2＋ at the specified loading amount of Hg^2＋. The chelating membrane could be operated at height feed flow rate and a large-scale removal of H^2＋ could be realized. With the increase of load amount, Hg^2＋ recovery decreased, but the saturation degree of chelating membrane increased. According to required recovery of H^2＋ and the saturation degree of chelating membrane, the optimum loading amount of Hg^2＋ should be selected in the actual removal of H^2＋.