ISO 4278:1977
Sodium fluoride for industrial use; Determination of carbonate content; Gravimetric method

Standard No.

ISO 4278:1977

Release Date

1977

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2002-05

Latest

ISO 4278:1977

Scope

Applicable to products having contents, expressed as Na2 CO3 , more than 0.02 % (m/m). Describes the release of the carbon dioxide from a test portion by acidification and heating. Entrainment of the carbon dioxide in a flow of air and absorption in weighed absorption tubes containing soda asbestos. Specifies the weighing of the absorption tubes to determine the quantity released.

ISO 4278:1977 history

• 1977 ISO 4278:1977 Sodium fluoride for industrial use; Determination of carbonate content; Gravimetric method