亚甲蓝分光光度法测定饮用水中阴离子表面活性剂的方法讨论

用10ml氯仿萃取离子缔合物一次,洗涤一次,不稀释。它与国标方法的线性回归无显著性差异,此方案测定样品的准确度En为0·34,小于1,结果令人满意,测量不确定度是除国标方法外最低的方案。因此它具有低污染、操作简单的特点,并可用于常规检测饮用水中的LAS。

The Discussion of the Determination of Anionic Surfactant in Drinking Water by MBAS Spectrophotometry

It comprises extracting ion pair with 10ml CHCl-3 once, no dilution, followed by an aqueous backwash and measurement of the blue color by spectrophotometry. The linear regression of the project has no distinct difference with GB5750-85-16.1.The accuracy of detection for sample is satisfactory, for E-n is 0.34 and it is less than 1.And the measurement uncertainty for sample is lowest except the state method GB5750-85-16.1.It can be used to routine examination of drinking water with such good characteristics as low pollution, simple operation.