【摘要】 研制了一种新的PVC膜铬（Ⅵ）电极,其电活性为季铵盐与氯铬酸根缔合物。实验过四种不同的季铵盐,发现三庚基十二烷基碘化铵[(C₇H₁₅)₃C₁₂H₂₅Nl]效果最佳。该电极在5×10^-6～1×10^-1mol·L^-1范围,有接近Nernst的响应,斜率为58mv/10倍程,其检测下限为3×10^-6mol·L^-1。将此电极用于实际样品（鞣革废水及铬鞣液）中铬的测定,所得到的结果与比色法吻合。还试验过该电积的响应电位与试液酸度间的关系,并发现与计算机模型的计算结果很相符。更多还原

【Abstract】 Based on an association compound of a quaternary ammonium salt and the chlorochromate complex anion（CrO₃Cl^-）, a new chromium（Ⅵ） electrode with a poly （vinyl chloride） （PVC） membrane has been developed. Four quaternary ammonium salts were investigated, of which (C₇H₁₅)₃C₁₂H₂₅NI was the best. The electrode shows it is near Nernst response in the range 5×10^-6～1×10^-1mol·L^-1 in aquous hydrochloric acid （pH<1）. The limit of detection is 3×10^-6mol·L^-1 and the slope is 58mv decade^-1 The relationship between the respose potential of the electrode and the acidity of the experimental solution has been tested, and found it corresponds with the results predicted by a computer model. The chrome in tanning waste and chrome tanning solution were also determined by using the proposed electrode.更多还原