盐湖卤水中毫克量钾和硫酸根的测定是一项重要的例行分析,通常采用容量法或重量法。前者精确度不够理想,后者操作烦琐、费时。温度滴定法系根据四苯硼钠阴离子与钾离子及钡离子与硫酸根沉淀反应的放热效应,以热敏电阻电桥系统检测反应体系的温度变化,用图纸记录计绘制温度滴定曲线,并根据其指示的起始点和终点,求出反应 The determination of milligrams of potassium and sulphate in salt lake brine is an important routine analysis, usually by volume or gravimetric methods. The former accuracy is not ideal, the latter operation cumbersome, time-consuming. Temperature titration is based on the tetrabenzene sodium anions and potassium ions and barium ions and sulfate precipitation reaction of the exothermic reaction to the thermistor bridge system to detect the temperature changes in the reaction system, The indication of the starting point and the end point, find the reaction