GOST 28990-1991
Fertilizers. Determination of ammoniacal nitrogen content in presence of other substances which realise ammonia when treated with sodium hydroxide. Tetrimetric method

Standard No.

GOST 28990-1991

Release Date

1991

Published By

RU-GOST R

Latest

GOST 28990-1991

GOST 28990-1991 Referenced Document

• GOST 10690-1973 Potassium carbonate for industrial use. Specifications
• GOST 25336-1982 Laboratory glassware and equipment. Basic parameters and dimensions
• GOST 4204-1977 Reagents. Sulphuric acid. Specifications
• GOST 4328-1977 Reagents. Sodium hydroxide. Specifications
• GOST 6691-1977 Reagents. Urea. Specifications
• GOST 9097-1982 Ammonium sulphate. Specifications

GOST 28990-1991 history

• 1991 GOST 28990-1991 Fertilizers. Determination of ammoniacal nitrogen content in presence of other substances which realise ammonia when treated with sodium hydroxide. Tetrimetric method