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Automatisierte Jodbestimmung in Röntgen-Kontrastern

Automatic iodine determination in X-ray contrasters

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Abstract

A new dehalogenation method with 0.15% sodium tetrahydroborate in 1 N sodium hydroxide and palladium as a catalyst (2 m Pd coated brass reaction tube) makes possible the ionisation of the organic bound iodine in 5 min at 85° C. Subsequently the aqueous solution is made acidic with sulphuric acid, the iodide oxidized to iodine with the aid of nitrite and then measured photometrically at 455 nm. The procedure is carried out in a Technicon AutoAnalyzer.

Zusammenfassung

Eine neue Dehalogenierungs-Methode mit 0,15% Natriumborhydrid in 1 N Natronlauge und Palladium als Katalysator (2 m mit Palladium beschichtetes Messing-Reaktionsrohr) ermöglicht die Ionisierung des organisch gebundenen Jods in 5 min bei 85° C. Anschließend wird die wäßrige Lösung mit Schwefelsäure angesäuert, das Jodid mit Nitrit zu Jod oxydiert und photometrisch bei 455 nm gemessen. Die Prozedur läuft in einem Technicon AutoAnalyzer.

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Literatur

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Author information

Authors and Affiliations

  1. Cilag-Chemie AG., Schaffhausen

    Robert A. Egli & Roberto Weber

  2. Technicon International Division S.A., Genf

    Robert A. Egli & Roberto Weber

Authors
  1. Robert A. Egli
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  2. Roberto Weber
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Additional information

Wir danken Herrn Marcel Bonnafé für seine Mithilfe und die wertvollen Ratschläge bei der Aufstellung der Apparatur.

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Egli, R.A., Weber, R. Automatisierte Jodbestimmung in Röntgen-Kontrastern. Z. Anal. Chem. 253, 355–357 (1971). https://doi.org/10.1007/BF00426348

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  • DOI: https://doi.org/10.1007/BF00426348

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