计算机控制恒电位电解库仑法

COMPUTER-CONTROLLED BULK ELECTROLYSIS WITH COULOMETRY

本工作将计算机用于恒电位电解库仑法的实验控制和数据处理中。电流的积分是通过每毫秒对电流进行采样并求和而实现的,由于非理想积分造成的误差可以忽略。系统能自动切换测量增益,能对实验时间、电流、电流比以及电量作实时显示,并判断实验终点。数据能被储存、以数字或图形的形式进行显示,背景电流亦能被扣除。

The computer is used in the experimental control and data processing for bulk electrolysis with coulometry. The integration of the current is accomplished by successively reading the current at a 1kHz rate and summing the current together. The error due to non-ideal integration is negligible.To get reasonable resolution and precision of the current reading the gain of the current to voltage converter is automatically controlled.The time elapsed,the current,the current ratio and the amount of charge are displayed on a real time base during the experiment. The end point of the electrolysis is also determined by the computer.The data can be stored and examined numerically or graphically,The background current can be readily subtracted.