Complexometric determination of thallium(III) in pure solution,alloys, and complexes using semicarbazide hydrochloride as a releasing agent |
| |
Authors: | Biju Mathew B Narayana B Muralidhara Rao C H Raghavan Nambiar B Ramachandra |
| |
Institution: | (1) Department of Postgraduate Studies and Research in Chemistry, Mangalore University, Mangalagangothri, 574199 Karnataka, India |
| |
Abstract: | A simple and accurate complexometric method is proposed for the determination of Tl(III) using semicarbazide hydrochloride as a releasing agent. In the presence of diverse metal ions, thallium is complexed first with a known excess of EDTA, and the surplus EDTA is then titrated with standard zinc sulfate at pH 5.0–6.0 (hexamine) using xylenol orange indicator. An excess of 5% aqueous neutral solution of semicarbazide hydrochloride is then added and the released EDTA is titrated against standard zinc sulfate solution. The method works well in the range 2–50 mg of Tl(III) with relative errors < 0.5%, standard deviations 0.05mg and coefficient of variation 0.4%. The method is applied for the determination of thallium content in complexes and alloy compositions |
| |
Keywords: | thallium determination complexometry masking semicarbazide hydrochloride |
本文献已被 SpringerLink 等数据库收录! |