Reference number
ISO 1389-11:1977
ISO 1389-11:1977
© ISO 2024
ISO 1389-11:1977
Phthalic anhydride for industrial use — Methods of test — Part 11: Determination of iron content — 2,2'- Bipyridyl photometric method
Edition 1
1977-03
1977-03
Retirada
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.
Ciclo de vida
¿Tiene alguna duda?
Consulte nuestras Ayuda y asistencia
Atención al cliente
+41 22 749 08 88
Horario de asistencia:
De lunes a viernes - 09:00-12:00, 14:00-17:00 (UTC+1)