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Spectrophotometric determination of gold with 2-(p-methoxyphenyl)-5,7-diphenyl-1,3,4-thiadiazolo-(3,2-a)-pyridinium chloride

Spektrophotometrische Gold-Bestimmung mit 2-(p-Methoxyphenyl)-5,7-di-pbenyl-1,3,4-thiadiazol-3,2-a-pyridiniumchlorid (TDZP)

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Summary

In 0.4M hydrochloric acid medium, gold(III) forms with 2-(p-methoxyphenyl)-5,7-diphenyl-1,3,4-thiadiazolo(3,2-a)pyridinium chloride (TDZP) an ion-association compound which is extractable into isoamyl acetate. The extracted ion-pair, which has an Au:TDZP mole ratio of 1∶1, is used for the spectrophotometric determination of gold (ε=3.80 x 104l·mole−1·cm−1) in the concentration range 1–25μg of gold per 5 ml of organic solvent. The interference of a number of foreign ions has been investigated. The method is applicable to the determination of gold in ores.

Zusammenfassung

In 0,4 M Salzsäure bildet Gold(III) mit TDZP eine Ionenassoziationsverbindung, die sich mit Isoamylacetat extrahieren läßt. Diese im Molverhältnis Au:TDZP=1∶1 zusammengesetzte Verbindung dient zur spektrophotometrischen Goldbestimmung (ε=3,80 x 104l·Mol−1·cm−1) im Konzentrationsbeieich 1–25μg Au/5 ml organisches Lösungsmittel. Die störende Wirkung von Fremdionen wurde untersucht. Das Verfahren eignet sich zur Goldbestimmung in Erzen.

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Authors and Affiliations

  1. Departamento de Química Analítica, Facultad de Ciencias, Universidad de Murcia, Spain

    T. Pérez Ruiz, C. Sánchez-Pedreño, M. Hernández Córdoba & C. Martinez Lozano

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  1. T. Pérez Ruiz
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  2. C. Sánchez-Pedreño
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  3. M. Hernández Córdoba
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  4. C. Martinez Lozano
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Pérez Ruiz, T., Sánchez-Pedreño, C., Hernández Córdoba, M. et al. Spectrophotometric determination of gold with 2-(p-methoxyphenyl)-5,7-diphenyl-1,3,4-thiadiazolo-(3,2-a)-pyridinium chloride. Mikrochim Acta 79, 395–401 (1983). https://doi.org/10.1007/BF01204822

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  • DOI: https://doi.org/10.1007/BF01204822

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