A differential kinetic potentiometric method with the Kalman filter for the simultaneous determination of multicomponents is described. The complexing reaction of iron(III) or zirconium (IV) with fluoride ion has a differential rate at certain reaction conditions. So iron and zirconium can be simult
The Automatic Kinetic Determination of Iron (III) and Vitamine C
β Scribed by P. van Den Winkel; J. Mertens
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2010
- Weight
- 328 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0037-9646
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β¦ Synopsis
Abstract
Prompt mixing of acetate buffered Iron(III) and ascorbic acid solutions results in the formation of a shortβlived colored [Fe~3~Ac~6~O] Asc complex showing a maximum absorbance at 550 nm. Mathematical analysis of the kinetics curves allows the elaboration of analytical procedures for the manual and automated determination of Iron(III) and vitamine C in a concentration range 0,1β100 ppm and 1β2000 ppm respectively.
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## Abstract The ^13^CβNMR. in Zn(II) (Protoporphyrin IX), Fe(III) (Protoporphrin IX) (CN)~2~, Zn(II) (Deuteroporphyrin IX dimethylester), and Fe(III) (Deuteroporphyrin IX) (CN)~2~ have been identified, and the ^13^C hyperfine shifts in the iron complexes evaluated. In a partial analysis of these da