PENENTUAN VANADIUM SECARA SPEKTROFOTOMETRI FOSFOWOLFROVANADAT DALAM BATUAN BUKIT PIANGGU KABUPATEN SOLOK

Roswita, Roswita and Suyani, Hamzar and Safni, Safni (2008) PENENTUAN VANADIUM SECARA SPEKTROFOTOMETRI FOSFOWOLFROVANADAT DALAM BATUAN BUKIT PIANGGU KABUPATEN SOLOK. Jurnal Riset Kimia, 2 (1). pp. 51-57. ISSN 1978-628X

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Abstract

A simple, rapid and accurate Spectrophotometric method described to the determination of vanadium in ore using sodium tungstat as a complexing agent. The method is based on the oxidation of sodium tungstat to form a yellow colored on reaction with vanadium (V), having maximum an absorption occurred at 403 nm. The relative standar deviation of the method for 8 mg/L vanadium (n=11) was 0.24%, and the molar absorptivity is 2.026 103 L mol-1cm-1 and sensitivity Sandell is 2.5 10-2 mg cm.2 . The recovery test is 99.47%. The effect of ion interfering Fe (element large amount in ore) on determination is describe. The general procedure which was developed is suittable for determination of 0-20 mg/L of Vanadium and should be applicable to variety of ore sample. Keywords : vanadium, spectrophotometric, sodium tungstat, ore

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