Home / Standards / GB/T 7494-1987 GB/T 7494-1987 Active Water quality--Determination of anionic surfactants--Methylene blue spectrophotometric method 水质 阴离子表面活性剂的测定 亚甲蓝分光光度法 Standard Type GBT ICS 13.060 CCS Z16 Status 现行 Issue Date 1987-03-06 Implementation 1987-08-01 Responsible Dept 生态环境部 Drafting Unit N/A