ISO 1389-10:1977
Phthalic anhydride for industrial use; Methods of test; Part X : Determination of 1,4- naphthaquinone content; Colorimetric method

Standard No.

ISO 1389-10:1977

Release Date

1977

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2002-05

Latest

ISO 1389-10:1977

Scope

The principle consists in the development of a pink colour by heating a test portion containing 1, 4-naphtoquinone with tin(II) chloride, and comparison of the colour produced with a series of prepared reference colours. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

ISO 1389-10:1977 history

• 1977 ISO 1389-10:1977 Phthalic anhydride for industrial use; Methods of test; Part X : Determination of 1,4- naphthaquinone content; Colorimetric method