含高可溶性盐油田废水中悬浮物的测定

Determination of Suspended Substance in Waste Water Containing High Soluble Salt

实验研究了可溶性盐对滤纸过滤法测定水中悬浮物的干扰，讨论了蒸馏水洗涤法消除可溶性盐干扰的不足。提出用双滤法消除可溶性盐干扰，通过室内和现场试验证明很有效。该法不改变原有的测定条件，具有较高的准确度和精密度。

The experiment studied the soluble salt interference towards filter paper filtra-tion to determine the suspended substance in water and discussions were made on insufficiency of using distilled water to remove the soluble salt interference,Double fiItration method was then raised to remove the soluble saIt interference.Through indoor and site tests,it proved to be high-ly effective,Without a change in its original determination conditions this method is of higher ac-curacy and precision.