NP 1274-1976
Sulfuric acid and oleum used in industry. Measurement of nitrogen content by photometry

Standard No.

NP 1274-1976

Release Date

1976

Published By

PT-IPQ

Latest

NP 1274-1976

Scope

This Standard is intended to establis the process for determining ammoniacal nitrogen in sulfuric acid and fuming sulfuric acid for industrial uses by the spectrophotometric process using sodium phenate and sodium hypochlorite.

NP 1274-1976 history

• 1976 NP 1274-1976 Sulfuric acid and oleum used in industry. Measurement of nitrogen content by photometry