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. (1378). EXTRACTIVE-SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM(V) AS AN ION-ASSOCIATION COMPLEX WITH 4-(2-PYRIDYLAZ0)-RESORCINOALN D TETRABUTYLAMMONIUM PERCHLORATE. , 11(1), -.
. "EXTRACTIVE-SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM(V) AS AN ION-ASSOCIATION COMPLEX WITH 4-(2-PYRIDYLAZ0)-RESORCINOALN D TETRABUTYLAMMONIUM PERCHLORATE". , 11, 1, 1378, -.
. (1378). 'EXTRACTIVE-SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM(V) AS AN ION-ASSOCIATION COMPLEX WITH 4-(2-PYRIDYLAZ0)-RESORCINOALN D TETRABUTYLAMMONIUM PERCHLORATE', , 11(1), pp. -.
. EXTRACTIVE-SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM(V) AS AN ION-ASSOCIATION COMPLEX WITH 4-(2-PYRIDYLAZ0)-RESORCINOALN D TETRABUTYLAMMONIUM PERCHLORATE. , 1378; 11(1): -.

EXTRACTIVE-SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM(V) AS AN ION-ASSOCIATION COMPLEX WITH 4-(2-PYRIDYLAZ0)-RESORCINOALN D TETRABUTYLAMMONIUM PERCHLORATE

Journal of Sciences, Islamic Republic of Iran
مقاله 3، دوره 11، شماره 1، خرداد 2000    اصل مقاله (304.06 K)
چکیده
A simple and sensitive extractive- spectrophotometric method for thedeterrnination
of trace amounts of vanadium(V) is reported. The method is based on the quantitative
extraction of the anion complex of V(V) with 4-(2-pyridy1azo)-resorcinol with
tetrabutylammonium perchlorate into chloroform, followed by spectrophotometric
measurements at 554 nm. Beer's law is obeyed over the concentration range of
5-350ng m l at 554 nm with a molar absorptivity of 1 . 3 1m ol cm . The relative standard deviation is 1.6% for a 100 ng ml vanadium solution. The interfering effect of various cations and anions was studied. The method was applied to thedeterrnination of vanadium is some synthetic samples
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