Extractive spectrophotometric determination of molybdenum(V) in molybdenum steels |
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| Authors: | K N Thimmaiah W D Lloyd G T Chandrappa |
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| Institution: | Department of Chemistry, University of Texas, El Paso, Texas 79968 U.S.A.;Department of Post-Graduate Studies and Research in Chemistry, University of Mysore, Manasa Gangotri, Mysore-570006, India |
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| Abstract: | An extraction spectrophotometric method has been developed for the determination of traces of molybdenum present in molybdenum steels which is based on the extraction of the orange-red molybdenum-thiocyanate-acetonethiosemicarbazone complex into chloroform from hydrochloric acid medium. The complex has an absorption maximum at 472 nm with a molar absorptivity of 1.9 × 104 liters mol−1 cm−1. Beer's law is valid over the concentration range 0.1–9.5 ppm of molybdenum with an optimum concentration range of 0.4–9 ppm. The equilibrium shift method indicates 1:4:2 composition for molybdenumthiocyanate-acetonethiosemicarbazone complex. The effect of acidity, reagent concentrations, temperature, and interferences from various ions are reported. |
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| Keywords: | To whom correspondence should be addressed |
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