Nagaraja, P. and Al-Tayar, Ghllab Saeed N. and Shivakumar, A. and Shresta, A. K. and Avinas Gowda, K. (2009) Spectrophotometric determination of the trace amount of thallium in water and urine samples by novel oxidative coupling reaction. E-JOURNAL OF CHEMISTRY, 6 (4). pp. 1153-1163. ISSN 0973-4945
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A novel, simple, rapid, sensitive and selective method has been proposed for the trace determination of thallium by spectrophotometric detection. This method is based on the oxidation of MBTH (3-methyl-2-benzothiazolinone hydrazone hydrochloride) by thallium(III) to form diazonium cation, which couples with IPH (Imipramine hydrochloride) in phosphoric acid medium at room temperature giving a blue colored species having a maximum absorption at 635 nm. The reagents and manifold variables influences on the sensitivity were investigated and the optimum reaction conditions have been established. The calibration curve was found to be linear over the range 0.1-5 mu g mL(-1) with the molar absorptivity and Sandell's sensitivity of 2.9 x 10(4) L mol(-1) cm(-1), 0.0071 mu g cm(-2) respectively. The tolerance limit of the method towards various ions usually associated with thallium has been detected. The relative standard deviation for five replicate determination of 2 mu g mL(-1) thallium was 0.47%. The method has been successfully applied for the determination of thallium(III) and thallium(I) in synthetic, standard reference materials, water and urine samples with satisfactory results. The performance of the proposed method was evaluated in terms of student's t-test and variance ratio F-test, to find out the significance of proposed method over the reported methods.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Spectrophotometry; MBTH; Imipramine hydrochloride; Thallium; Water and Urine samples |
| Subjects: | C Chemical Science > Chemistry |
| Divisions: | Department of > Chemistry |
| Depositing User: | Users 19 not found. |
| Date Deposited: | 17 Aug 2019 07:34 |
| Last Modified: | 06 Jul 2022 05:52 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/6491 |
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