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Study of the reaction between lanthanum perchlorate and Eriochrome Cyanine R in strongly alkaline solutions

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Summary

The nature of the reaction product between La(III) and ECR has been investigated and an empirical formula proposed for the observed lake. Chemical analysis of the lake demonstrated it does not possess a definite structure, the composition of the isolated product being dependent on the experimental conditions and composition of the solution. X-ray studies revealed the amorphous nature of the isolated product. D. T. A. study of the product was made and a decomposition sequence is proposed for the same.

Zusammenfassung

Das Reaktionsprodukt aus La(III) und Eriochromcyanin R wurde untersucht und eine empirische Formel für diese Lackverbindung vorgeschlagen. Die chemische Analyse zeigt, daß sie keine definierte Struktur hat, sondern in ihrer Zusammensetzung von den Versuchsbedingungen und von der Konzentration der Lösung abhängt. Die Röntgenanalyse zeigt, daß das isolierte Reaktionsprodukt amorph ist. Aufgrund einer Differential-Thermoanalyse wurden die Einzelvorgänge der Zersetzung dargelegt.

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Authors and Affiliations

  1. Department of Chemistry Faculdade de Filosofia, Ciências e Letras de Ribeirão Prêto, Brazil

    Julien F. C. Boodts, Waldemar Saffioti & Elisa S. Gasparini

  2. Faculdade de Filosofia, Ciências eLetras de Araraquara, São Paulo, Brazil

    Julien F. C. Boodts, Waldemar Saffioti & Elisa S. Gasparini

Authors
  1. Julien F. C. Boodts
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  2. Waldemar Saffioti
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  3. Elisa S. Gasparini
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Boodts, J.F.C., Saffioti, W. & Gasparini, E.S. Study of the reaction between lanthanum perchlorate and Eriochrome Cyanine R in strongly alkaline solutions. Mikrochim Acta 63, 355–363 (1975). https://doi.org/10.1007/BF01217664

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  • DOI: https://doi.org/10.1007/BF01217664

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