Phthalanilic acids as highly selective reagents for the amperometric determination of thorium(IV) |
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Authors: | Sharma C L Arya R S |
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Institution: | Chemistry Department, University of Roorkee, Roorkee, India. |
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Abstract: | Th(IV) has been determined by amperometric titration at an applied emf of -1.0 V with ten phthalanilic acids. Of these, the 2,5-dichloro, 4-bromo, 3-nitro, 4-nitro and 1-naphthyl derivatives were found promising analytical reagents and most effective. Th(IV) in the range 11.6-1160 mg/10O ml can be determined with an error of +/- 0.3%. The possible interference of 46 ions was studied and only two. Pd(II) and Zr interfered; they could be masked by the addition of dimethylglyoxime or Nioxime, and pyrophosphate respectively. |
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Keywords: | Correspondence to Vikas Nagar 134/3 University of Roorkee Roorkee (U P ) India |
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