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Norm
ISO 6685:1982
Issue date: 1982 07 01
Chemical products for industrial use — General method for determination of iron content — 1,10-Phenanthroline spectrophotometric method
All the iron(III) present in the test solution is reduced to iron(II) with ascorbic acid. At a pH between 2 and 9 1,10-phenanthroline is added. the measurement of the abs...
Withdrawn: 2016 10 03
Publisher:
International Organization for Standardization
Format:
Digital | 4 Pages
Language:
English
ICS
All the iron(III) present in the test solution is reduced to iron(II) with ascorbic acid. At a pH between 2 and 9 1,10-phenanthroline is added. the measurement of the absorbance of the orange-red complex formed is carried out at the wavelength of maximum absorption (510 nm). The method is applicable to test solutions from which an aliquot portion can be taken containing between 10 and 500 g of Fe in a volume of not more than 60 m. Details of certain interferences and means by which they can be overcome are given in an annex.
