Determination method of water conductivity
SU Lingyan, LIU Baofeng, LIU Xiaolin, LI Hongzhi, YANG Pin, DAI Weina, CAI Shuhong
The 718th Research Institute of China Shipbuilding Industry Corporation, Handan 056027, China
摘要：建立一种适用于地表水、地下水、海水和废水电导率的测定方法。待测水样在4℃下密封保存，并于24 h内用校正过的电导率仪测定25℃时的电导率。当测定温度超出(25±0.1)℃范围时，需进行温度补偿。该方法针对不同样品，分别采用过滤法、萃取法及过滤-萃取法进行预处理，比较了干扰消除效果，结果表明过滤法适用于所有水样。对4 种不同水体的水样进行测定，测定结果的相对标准偏差均小于0.6%(n=6)。验证结果表明，该方法具有较好的重复性和准确性。
Abstract：A method for the conductivity determination of surface water, ground water, sea water and waste water
was established. The water sample was sealed and stored at 4℃, and the conductivity of the water sample at 25℃ would be
measured within 24 h by a calibrated conductivity meter. When the temperature of water sample was not at (25±0.1)℃, the
test result needed to be compensated according to the temperature of measured water sample. The interference eliminating
effect of filtration method, extraction method and filtration-extraction method were compared, and the filtration method was
the best for all sorts of water samples. Water samples from 4 different water bodies were tested, and the relative standard
deviations of the results were less than 0.6%(n=6). The verification results showed that this method had good repeatability
Keywords：water conductivity; interference cancellation; method validation
苏玲燕，刘保锋，刘晓林，等. 水质电导率测定方法[J]. 化学分析计量，2019，28(Z1)：37-40.
SU L Y，LIU B F，LIU X L，et al. Determination method of water conductivity[J]. Chemical analysis and meterage，2019，28(Z1)：37-40.