China 'GB/T 11742-1989
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 11742-1989
Standard method for hygienic examination of hydrogen sulfide in air of residential areas--Methylene blue spectrophotometric method 居住区大气中硫化氢卫生检验标准方法 亚甲蓝分光光度法
Issued Date:1989-09-21
Implemented Date:1990-07-01
Issued by:
The Standardization Administration of the People's Republic of China
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