测定锅炉水和冷却水中氯离子的新方法探讨

Discussion on the new method of determining chloride ions in boiling water and cooling water

阐述了用全自动电位滴定仪测定锅炉水和冷却水中氯离子(Cl-)含量的新方法。新方法采用梅特勒-托利多仪器公司的DL58全自动电位滴定仪,并选择DM141银复合电极为检测器,用AgNO3作为滴定剂进行全自动滴定分析。新方法与传统的Cl-测定法(摩尔法、佛尔哈德法、法扬司法等)和Cl-选择电极法相比,测定结果更加准确,方法的重现性和精确度更高,且简单快捷,试剂的消耗成本降低,可广泛应用于锅炉水和冷却水、生活污水、部分工业污水、雨水、饮用水等方面的分析测定。

A new method using automatic potential titration apparatus for determining the content of chloride in boiling water and cooling water is introduced. DL58 which is made by Mettler-Toledo Automatical Potential Titration Apparatus Co. has been chosen. DM141 silver composite electrode has been chosen as the detector. AgNO3 is used as titration agent in the automatic titration method. Compared with the standard （traditional） methods of determining chloride （such as Mohr method, Volhard method, and Fajans method） and with the chloride selective method, the results of this method are more accurate. The reproducibility and accuracy of this method are better. This method is faster and the consumption cost of reagent is much less. It could be widely used in the determination of boiler water, cooling water, domestic sewage, part of industrial wastewater, rain water and drinking water.