NP 1273-1976
Nitric acid used in industry. Measurement of nitrogen content by photometry

Standard No.

NP 1273-1976

Release Date

1977

Published By

PT-IPQ

Latest

NP 1273-1976

Scope

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

NP 1273-1976 history

• 1977 NP 1273-1976 Nitric acid used in industry. Measurement of nitrogen content by photometry