中文摘要：

在遵循水玻璃模数测定原理的基础上，提出了一种基于电位法的水玻璃模数自动测定方法并设计了相关仪器，采用金属锑电极和温度传感器组成的信号采集单元采集到的电位信号取代传统的指示剂判断滴定终点；采用微型蠕动泵对待测溶液进行精确加液滴定代替手工加液滴定；采用STM32F103微控制器控制整个滴定过程并进行数据处理；采用磁力加热搅拌器对整个滴定过程进行加热搅拌．试验结果表明采用该方法及仪器可以自动、快速、准确测定水玻璃模数．

英文摘要：

Method and instrument were introduced which could automatically determine the modulus of the sodium silicates based on potentiometry. The potential signals were collected by signal acquisition unit consisted of the antimony electrode and the temperature sensor.Micro-peristaltic pump was used to liquid fill and titrate solution.The STM32F103 microcontroller was exploited to control the titration process and carry out the data processing.Magnetic heating stirrer was applied to heat and mix the solution.The results show that the method and instrument can determine the modulus of the sodium silicate automatically,fleetly and accurately.