NF T20-297:1971
Chemical analysis of sulphuric acid and oleum. Determination of ammoniacal nitrogen. Spectrophotometric method.

Standard No.

NF T20-297:1971

Release Date

1971

Published By

Association Francaise de Normalisation

Status

Withdraw

Latest

NF T20-297:1971

NF T20-297:1971 history

• 1971 NF T20-297:1971 Chemical analysis of sulphuric acid and oleum. Determination of ammoniacal nitrogen. Spectrophotometric method.