Home / Standards / GB/T 11898-1989 GB/T 11898-1989 Abolished Water quality--Determination of free chlorine and total chlorine--Spectrophotometric method using N，N-diethyl-1，4-phenylenediamine 水质 游离氯和总氯的测定 N，N-二乙基-1，4-苯二胺分光光度法 Standard Type GBT ICS N/A CCS Z16 Status Abolished Issue Date 1989-11-03 Implementation 1990-07-01 Centralized Committee 生态环境部 Issuing Authority 国家技术监督局