氯离子检测技术探究——直接电位法

Exploration in Detection Technology of Chloride Ion—— Direct Potentiometry

直接电位法是一种利用电极来检测水溶性氯离子含量的电化学方法,具有速度快、适用性广等优点,既可用于试验室检测,又可用于现场检测。文中的试验设计了四种浓度的NaCl标准溶液;并以此绘制了三种E-lg C关系曲线;对四种已知浓度的试验溶液分别采用三种E-lg C关系曲线进行推算;并对推算结果进行了对比分析。研究结果显示,选用与待测溶液浓度相适应的标准曲线进行推算,将极大地提高氯离子含量检测结果的准确性。

Direct potential test is an electron-chemical method of detecting water soluble chloride ion content with electrodes,fast in speed and wide in applicability,and can be applied both for test in laboratory and on site.We draw three kind of E-lg C relation curves upon NaCl standard solutions with four different concentrations designed in the experiment,calculate four solutions with known concentrations based on the three E-lg C relation curves,and compare and analyze the calculation results.The research results show that the test result accuracy for chloride ion content would be greatly improved when selecting standard curve which suits the concentration of solution to be measured.