Spectrophotometric determination of tetraphenyl-arsonium salts by solvent extraction with vanadium—par complex

An extraction-visible spectrophotometric method for the determination of tetraphenylarsonium salts is described. The method is based on the extraction of the ion-pair formed between the tetraphenylarsonium cation and the anionic vanadium(V)– 4-(2-pyridylazo)resorcinol complex, followed by the spectr...

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Bibliographic Details
Published in:Analytica chimica acta 1975, Vol.79, p.265-272
Main Authors: S̆iroki, M., Marić, Lj
Format: Article
Language:English
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Summary:An extraction-visible spectrophotometric method for the determination of tetraphenylarsonium salts is described. The method is based on the extraction of the ion-pair formed between the tetraphenylarsonium cation and the anionic vanadium(V)– 4-(2-pyridylazo)resorcinol complex, followed by the spectrophotometric measurements of the coloured organic phase at 560 nm. The method can be applied to micro amounts of tetraphenylarsonium salt or to very dilute solutions (10 -6 – 10 -5 M). It is more sensitive and less subject to interferences than the direct u.v. method.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(00)89438-6