ISO 1389-11:1977

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Phthalic anhydride for industrial use — Methods of test — Part 11: Determination of iron content — 2,2′- Bipyridyl photometric method

Published By	Publication Date	Number of Pages
ISO	1977-03	5

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Categories: 71.080.50 - Anhydrides, ISO

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Description

The principle is based on the dissolution, in hot hydrochloric acid, of the residue from the determination of the ash of a test portion (see ISO 1389/8). Reduction, by hydroxylammonium chloride, of the iron(III) contained in the solution thus obtained, formation of the coloured complex iron(II)-2,2'bipyridyl in a buffered medium. Photometric measurement of the coloured complex at a wavelength of about 510 nm. – ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1977-03
Pages Count	5
Language	English
Edition	1
File Size	245.8 KB
ICS Codes	71.080.50 - Anhydrides

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ISO 1389-11:1977

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