Selective mercury determination after membrane complexation and total reflection X-ray fluorescence analysis.
Selective mercury determination after membrane complexation and total reflection X-ray fluorescence analysis.
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DOI：
10.1021/ac049780a
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发表时间：
2004-08
影响因子：
7.4
通讯作者：
Pavlos E. Koulouridakis;N. Kallithrakas‐Kontos
中科院分区：
文献类型：
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作者：
Pavlos E. Koulouridakis;N. Kallithrakas‐Kontos
本文提出了一种测定饮用沃茨中低浓度汞的新方法。在石英玻璃（反射器）表面上产生含有几微克各种络合剂的膜。将反射器浸入含有各种浓度的低浓度无机汞盐（1-40 ng/mL）的水溶液中。将膜在5-500 mL溶液中平衡数小时;当平衡阶段结束时，用超纯水清洗并干燥。通过全反射X射线荧光（TXRF）进行分析。考察了各种实验参数（络合剂、平衡时间、进样量等）对测定结果的影响。以及膜的选择性进行了研究。络合剂双硫腙与PVC基膜得到最好的结果。定量限为0.8 ng/mL。
A new method for low mercury concentration analysis in drinking waters is presented. Membranes containing a few micrograms of various complexing reagents were produced on the surface of quartz glasses (reflectors). The reflectors were immersed in water solutions containing various concentrations of inorganic mercury salts at low concentrations (1-40 ng/mL). The membranes were left to equilibrate in 5-500 mL of solution for many hours; when the equilibration stage was finished they were cleaned with ultrapure water and left to dry. Analyses were performed by total reflection X-ray fluorescence (TXRF). The effects of various experimental parameters (complexing agent, equilibrium time, sample volume, etc.) as well as the selectivity of the membranes were studied. The complexing reagent dithizone with a PVC-based membrane gave the best results. The limit of quantitation was 0.8 ng/mL.