Home / Standards / GB/T 7481-1987 GB/T 7481-1987 Abolished Water quality--Determination of ammonium--Spectrophotometric method with salicylic acid 水质 铵的测定 水杨酸分光光度法 Standard Type GBT ICS 13.060 CCS Z16 Status 废止 Issue Date 1987-03-06 Implementation 1987-08-01 Responsible Dept 生态环境部 Drafting Unit N/A