Home / Standards / GB/T 11224-1989 GB/T 11224-1989 Active Analytical method of thorium in water 水中钍的分析方法 Standard Type GBT ICS N/A CCS Z33 Status Active Issue Date 1989-03-31 Implementation 1990-01-01 Centralized Committee 生态环境部 Issuing Authority 国家环境保护局