ISO 1592:1977
Urea for industrial use; Determination of nitrogen content; Titrimetric method after distillation

Standard No.

ISO 1592:1977

Release Date

1977

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2002-05

Latest

ISO 1592:1977

Scope

The procedure is based on the catalytic conversion of nitrogen present in a test portion to ammonia by heating in concentrated sulphuric acid solution. Distillation and absorption of the ammonia in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of an indicator. - Replaces ISO Recommendation R 1592-1970.

ISO 1592:1977 history

• 1977 ISO 1592:1977 Urea for industrial use; Determination of nitrogen content; Titrimetric method after distillation