A fast and precise heterometric determination of thallium(I) with sodium tetraphenylborate |
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Authors: | The late M Bobtelsky I Barzily |
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Institution: | Department of Inorganic and Analytical Chemistry, The Hebrew University, JerusalemIsrael |
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Abstract: | The heterometric titration of thallium(I) with sodium tetraphenylborate, at various pH values and in the presence of salts and different complexing agents, was studied; 1.5–0.75 mg of thallium(I) could be determined within 3–4 min, and the error was negligible. Of the complexing agents studied, sodium pyro- and tripolyphosphate had a specific influence, raising the sensitivity about 4-fold, and no interference was caused by the presence of 30–130-fold molar excesses of the following metals: Ca, Mg, Zn, Mn, Co, Ni, Fe(III), Al, UO2(II), Cd, Cu(II), Pb, Bi(III), Ag, V(V), Mo(VI) W(VI) and Th. Pd, Au(III) and Pt(IV) did not interfere. |
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