ISO 1983:1977
Nitric acid for industrial use; Determination of sulphated ash; Gravimetric method

Standard No.

ISO 1983:1977

Release Date

1977

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2002-05

Latest

ISO 1983:1977

Scope

The principle of the method consists inevaporation of a test portion in a platinum dish, conversion of the residue to sulphates by treatment with sulphuric acid; ignition in an electric furnace, controlled at (800 +- 25) ?C, and weighing. Replaces ISO Recommendation R 1983-1971.

ISO 1983:1977 history

• 1977 ISO 1983:1977 Nitric acid for industrial use; Determination of sulphated ash; Gravimetric method