中華人民共和國國家標準
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 4921-1985
Waste gasfrom manufacturing process--Determination of chemical oxygendemand and nitrogenoxide--Potassium dichromate oxidation and naphthylethylene diamine colorimetric method 工業廢氣 耗氧值和氧化氮的測定 重鉻酸鉀氧化、萘乙二胺比色法
Issued Date:1985-01-18
Implemented Date:1985-08-01
Issued by:
The Standardization Administration of the People's Republic of China