电导率仪测定生活饮用水中溶解性总固体方法的研究

RESEARCH ON THE DETECTION OF TOTAL DISSOLVED SOLIDS IN DRINKING WATER BY CONDUCTIVITY METER

[目的]研究一种测定生活饮用水中溶解性总固体的简便、快捷、准确、耗能低的方法。[方法]利用电导率仪法测定生活饮用水的溶解性总固体。[结果]方法的标准偏差(RSD)不论溶解性总固体含量的高低(≥1000mg/L或﹤1000mg/L)均为0,平均回收率(除采用加CaCL2、105℃±3℃烘烤之外)不论溶解性总固体含量的高低(≥1000mg/L或﹤1000mg/L)为100%或接近100%。[结论]用电导率仪法测定生活饮用水中的溶解性总固体,方法极为简便、快捷、精密度好、回收率高、结果可靠、耗能极低。

[Objective]To develop an easy,convenient,accurate and economic method for detecting total dissolved solids in drinking water.[Methods]The content of total dissolved solids in drinking water was detected by conductivity meter.[Results]The standard deviation of the method was zero,no matter the content of total dissolved solids was high or low（≥1 000 mg/L or﹤1 000 mg/L）. The average recovery（except for firing in 105℃±3℃ after addition of CaCl2 ）was 100% or near 100%,no matter the content of total dissolved solids was high or low（≥1 000 mg/L or﹤1 000 mg/L）.[Conclusion]The method for detecting total dissolved solids in drinking water by conductivity meter is of high convenience,accuracy,precision,recovery,reliability,and low energy consumption.