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Separation and determination of nobium(V) and tantalum(V) as 2-(5-bromo-2-pyridylazo)-5-[N-(3-sulfopropyl)amino]phenol citrate ternary complexes in geological samples using ion interaction high-performance liquid chromartography

Citation

Vachirapatama, N and Doble, PA and Haddad, PR, Separation and determination of nobium(V) and tantalum(V) as 2-(5-bromo-2-pyridylazo)-5-[N-(3-sulfopropyl)amino]phenol citrate ternary complexes in geological samples using ion interaction high-performance liquid chromartography, Analytica Chimica Acta, 409, (1-2) pp. 35-43. ISSN 0003-2670 (2000) [Refereed Article]


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DOI: doi:10.1016/S0003-2670(99)00815-6

Abstract

A method for the simultaneous separation and determination of Nb(V) and Ta(V) as ternary complexes formed with 2-(5-bromo-2-pyridylazo)-5-[N-propyl-N-(3-sulfopropyl)amino]phenol (PAPS) and citrate was developed using ion interaction reversed-phase high-performance liquid chromatography (HPLC) on a C18 column. An artificial neural network (ANN) in combination with a reduced factorial experimental design was utilised to optimise the mobile phase compositions and the conditions used for pre-column complex formation. Under the optimum conditions determined by the ANN, the Nb(V) and Ta(V) complexes were eluted within 5 min. The detection limits (signal to noise ratio = 3, detection wavelength 600 nm) for Nb(V) and Ta(V) were 0.03 and 0.40 μg/l, respectively, which correspond to 0.03 and 0.40 μg/g in the solid samples. The method was applied to the analysis of geological samples and the results obtained by the HPLC method agreed well with the results obtained by ICP-MS and also with the certified values.

Item Details

Item Type:Refereed Article
Keywords: Niobium(V); Tantalum(V); 2-(5-bromo-2-pyridylazo)-5-[N-propyl-N-(3-sulfopropyl)amino]phenol (PAPS); High-performance liquid chromatography
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Vachirapatama, N (Dr Narumol Vachirapatama)
Author:Doble, PA (Mr Philip Andrew Doble)
Author:Haddad, PR (Professor Paul Haddad)
ID Code:19322
Year Published:2000
Web of Science® Times Cited:15
Deposited By:Chemistry
Deposited On:2000-08-01
Last Modified:2010-02-20
Downloads:0

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