在线恒温pH计的研究

Research on On-line Constant Temperature pH Meter

在线连续测量pH值时 ,温度是影响pH测量准确度的主要因素之一。为减小温度对测量的影响 ,利用半导体制冷片的双向功能及体积小的特点 ,将pH电极置于小型恒温系统内进行连续测量 。

The on line pH measurement of liquor has been applied abroad in the department of the electric power and the chemistry.It is an important parameter to scale the acidity and basicity of liquor.Through the on-line continual pH measurement,the acidity and basicity of water can be controlled within a preconcerted range and the erodation and the fabrication of the instrument are depreciated.But the temperature is the major factor to affect the measurement accuracy.To deduce the error,in this article,according to the character of the double function and small volume of semiconductor refrigeration and we put a pH pole in the small constant temperature system.By this means the fluctuation of temperature will be faint,so the measurement accuracy of the instrument is improved.