ISO 1390-6:1977
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Maleic anhydride for industrial use — Methods of test — Part 6: Determination of iron content — 2,2'- Bipyridyl photometric method
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
27-02-2019
English, French
01-06-1977
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 1390/5). 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 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.
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