GB/T 7481-1987 Water quality–Determination of ammonium–Spectrophotometric method with salicylic acid
Standard Number: GB/T 7481-1987(GB/T7481-1987)Chinese:水质 铵的测定 水杨酸分光光度法English:Water quality–Determination of ammonium–Spectrophotometric method with salicylic acid Effective Date:1987-08-01Regulatory Authority: Ministry of Ecology and Environment Issuing Regulatory Authority:State Environmental Protection Bureau Adheres to international…