The determination of selenium(IV) by thermometric enthalpy titration with thiosulphate |
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| Authors: | JK Grime AD Campbell AH Yahaya |
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| Institution: | Department of Chemistry, University of Denver, University Park, Denver, Colorado 80208 U.S.A.;Department of Chemistry, University of Otago, P.O. Box 56, DunedinNew Zealand |
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| Abstract: | Selenimn(IV) can be titrated in the range 0.2–6 mg with thiosulphate; relative standard deviations are 1.2–0.54%. Experimental conditions were manipulated to use the endothermic enthalpy of dilution and disproportionation of thiosulphate to advantage in improving end-point precision. Common anions do not interfere; interferences from copper(II), iron(III), lead(II) and mercury(II) can be minimized by masking. |
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