GB/T 7490-1987 in English

《GB/T 7490-1987水质 挥发酚的测定 蒸馏后4-氨基安替比林分光光度法》由467（生态环境部）归口，主管部门为生态环境部。
本标准适用于饮用水、地面水、地下水和工业废水中挥发酚的测定。其测定范围为0.002～6mg/L。浓度低于0.5mg/L时，采用氯仿萃取法，浓度高于0.5mg/L时，采用直接分光光度法。氧化剂、油类、硫化物、有机或无机还原性物质和芳香胺类干扰酚的测定。

Scope

This standard applies to the determination of volatile phenols in drinking water, surface water, ground water and industrial wastewater. Its determination range is 0.002～6mg/L. When the concentration is lower than 0.5mg/L, the chloroform extraction method is used, and when the concentration is higher than 0.5mg/L, the direct spectrophotometric method is used. Determination of oxidants, oils, sulfides, organic or inorganic reducing substances and aromatic amines interfering phenols.