Baranowski R, Kubik T
Department of Analytical and General Chemistry, Silesian Technical University, Gliwice, Poland.
Talanta. 1993 Sep;40(9):1465-71. doi: 10.1016/0039-9140(93)80227-i.
A new electroanalytical method for determining chloride ions with an Air-Gap cyanide sensor system is described. The method is based on the reaction of chloride with mercury(II) cyanide in dilute sulphuric acid. This reaction leads to hydrogen cyanide which can be determined with an Air-Gap cyanide sensor. Optimum concentrations of mercury(II) cyanide and sulphuric acid were established and an analytical curve was prepared for 1 x 10(-1)-1 x 10(-5)M Cl(-). The slope of the calibration curve was equal to 62.8 mV/log C. The correlation coefficient (R) was equal to 0.9992. The method can determine chloride with good results in high saline solutions and in the presence of surfactants, which is in contrast to direct potentiometry with a chloride electrode. The method was applied for chloride determination in fuses used for initiating explosions. The chlorides were determined both in the raw materials used to prepare the fuse braids and in the other fuse components. Chloride was also determined in drinking water and river water. In dependence of source, chloride amount analyzed in drinking water was in the range 2.18-182.6 mg/l. and 25.8 mg/l. in river water. A comparative analysis was carried out. In the first case, chloride was determined by a turbidimetric method, whereas in the second one by potentiometric titration against a chloride-ISE.
描述了一种使用气隙氰化物传感器系统测定氯离子的新电分析方法。该方法基于氯离子在稀硫酸中与氰化汞（II）的反应。此反应会生成氰化氢，可通过气隙氰化物传感器进行测定。确定了氰化汞（II）和硫酸的最佳浓度，并绘制了1×10⁻¹ - 1×10⁻⁵M Cl⁻的分析曲线。校准曲线的斜率等于62.8 mV/log C。相关系数（R）等于0.9992。与使用氯离子电极的直接电位法相比，该方法在高盐溶液和存在表面活性剂的情况下测定氯离子能获得良好结果。该方法应用于起爆用保险丝中氯离子的测定。对制备保险丝编织物所用的原材料以及其他保险丝组件中的氯化物都进行了测定。还对饮用水和河水中的氯化物进行了测定。根据来源不同，饮用水中分析出的氯化物含量在2.18 - 182.6 mg/l范围内，河水中为25.8 mg/l。进行了对比分析。第一种情况中，氯化物通过比浊法测定，而第二种情况则通过用氯离子离子选择性电极进行电位滴定来测定。
