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近年来,化学修饰电极的报导越来越多,用化学方法在电极表面引入各种有机官能团,使电极具有特定的功能,但是这些研究多半仅涉及这类电极的制作和特性,而很少报导它们在分析测定中的应用。柄山和铃木用氯化血红素修饰的氧化銦电极对吡啶中铜的行为作过研究。他们还利用络合剂(IDA,EDTA、GEDTA)修饰玻碳电极,然后把该电极浸入硝酸银水溶液中,其Ag~+的捕集与未修饰电极相比,增加20—40倍。循环扫描伏安的氧化波面积在Ag~+浓度为1×10~(-6)—5×10~(-6)M的范围内成比例关系。Izutsu等人和Lubert等人研究了3-辛基氧化膦修饰的玻碳电极用于定量测定水溶液中微量铀,后者指出,测
In recent years, there are more and more reports on chemically modified electrodes. The introduction of various organic functional groups on the surface of electrodes through chemical methods has given the electrodes a special function. However, most of these researches only deal with the fabrication and properties of these electrodes, Their use in analytical determination. Takayama and Suzuki studied the behavior of copper in pyridine with a hemin-modified indium oxide electrode. They also modified the glassy carbon electrode with a complexing agent (IDA, EDTA, GEDTA) and then immersed the electrode in aqueous silver nitrate solution with a 20-40 fold increase in Ag + capture compared to the unmodified electrode. The area of the oxidized wave of cyclic voltammetry is proportional to the concentration of Ag ~ + in the range of 1 × 10 -6 -6 -5 × 10 -6 M. Izutsu et al. And Lubert et al. Studied 3-octylphosphine oxide-modified glassy carbon electrodes for the quantitative determination of trace uranium in aqueous solutions. The latter pointed out that