Rapid and simple chromatographic separation of V(V) and V(IV) using KH-phthalate and their determination by flame atomic absorption spectrometry |
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Authors: | A Gáspár and József Posta |
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Institution: | (1) Department of Inorganic and Analytical Chemistry, Kossuth L. University, H-4010 Debrecen 10, P.O. Box 21, Hungary, HU |
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Abstract: | A method was developed for the chromatographic separation of V(V) and V(IV) based on the different sorption forces of these
vanadium species in C18 columns in presence of KH-phthalate. The vanadium species were detected with a flame atomic absorption
spectrometer with acetylene/N2O flame. The detection limits (3σ) of V(V) and V(IV) were 0.18 μg/mL and 0.15 μg/mL, respectively. The relative standard deviations
(N = 5) are 4.2% and 3.4% for 20–20 μg/mL V(V) and V(IV), respectively. The sampling frequency is 75/h. Because of the special
interaction occurring between phthalate and V(IV) on the C18 column and the acetylene/N2O flame atomic absorption detection, practically no interferences can be detected even in large inorganic matrix.
Received: 20 February 1997 / Revised: 2 June 1997 / Accepted: 7 June 1997 |
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