乙二胺四乙酸二钠测定饮用水中硬度影响因素及注意事项

Influencing Factors and Precautions for Determination of Hardness in Drinking Water by Disodium Ethylenediaminetetraacetate

在饮用水硬度的测定中,乙二胺四乙酸二钠滴定法的使用最为广泛,并且操作简便、灵敏度高,具有良好的影响效果.乙二胺四乙酸二钠测定水中硬度易受到诸多因素影响,导致测定结果不准确,强调对测定影响因素的有效控制,提高测定准确度.本文分析了乙二胺四乙酸二钠测定饮用水中硬度的实验操作,并在此基础之上,从缓冲溶液、滴定速度、水样温度、pH值、试剂配制等方面,具体阐述了乙二胺四乙酸二钠测定饮用水中硬度的影响因素及注意事项,以确保测定结果的准确性.

Ethylenediaminetetraacetic acid disodium titration is the most widely used method in the determination of hardness of drinking water. It is easy to operate, sensitive and has a good effect. Ethylenediaminetetraacetic acid disodium determination of hardness in water, vulnerable to many factors, resulting in inaccurate results, emphasizing the effective control of influencing factors, improve the accuracy of determination. This paper analyses the experimental operation of determining the hardness of drinking water by EDTA disodium, and on this basis, from the aspects of buffer solution, titration speed, water sample temperature, pH value, reagent preparation and so on, expounds in detail the influencing factors and matters needing attention in determining the hardness of drinking water by EDTA disodium, so as to ensure the determination results. Accuracy.