离子选择性电极重金属检测仪器设计和试验

摘要

介绍了采用离子选择性电极的重金属检测仪器设计和温度补偿试验.首先描述整个仪器的系统结构,针对离子选择电极的前置放大电路和基于P t1000的测温电路进行了详尽的分析,最后以Ag+离子为研究对象,进行温度补偿试验的探讨,采用线性函数对数据进行拟合处理,得到初步分析结果.试验结果证明,仪器电路结果可靠稳定,为相关设计提供了参考.%This paper introduced the design of heavy metal detection instrument using ion selective electrode and the relative temperature compensation test.This paper first described the structure of the instrument, and the preamplifier circuit of ion selec-tive electrode and temperature measurement circuit with PT1000 temperature sensor were analyzed in detail.Finally with Ag+ ion as the research object, temperature compensation test was discussed, the test data was processed with linear fitting method to get the preliminary test result.The test results show that the instrument circuit is reliable and stable, which can provide information for the relative design.