GB 4921-1985
Waste gas from manufacturing process-Determination of chemical oxygendemand and nitrogen oxide-Potassium dichromate oxidation and naphthylethylene diamine colorimetric method (English Version)

Standard No.

GB 4921-1985

Language

Chinese, Available in English version

Release Date

1985

Published By

中华人民共和国环境保护部

Latest

GB 4921-1985

GB 4921-1985 history

• 1985 GB 4921-1985 Waste gas from manufacturing process-Determination of chemical oxygendemand and nitrogen oxide-Potassium dichromate oxidation and naphthylethylene diamine colorimetric method