ISO 1389-11:1977
Phthalic anhydride for industrial use — Methods of test — Part 11: Determination of iron content — 2,2'- Bipyridyl photometric method
Reference number
ISO 1389-11:1977
Edición 1
1977-03
Retirada
ISO 1389-11:1977
5965
Retirada (Edición 1, 1977)

Resumen

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.

Informaciones generales

  •  : Retirada
     : 1977-03
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 3
  • ISO/TC 47
    71.080.50 
  • RSS actualizaciones

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