<b>Evaluation of DMIT [4,5-Dimercapto-1,3-Dithyol-2-Thionate] as chelating agent in a cloud point extraction procedure for Pb2+ determination in water samples</b> - doi: 10.4025/actascitechnol.v35i2.18076
<p class="aresumo">The present study proposes a new method for cloud point preconcentration of Pb<sup>2+</sup> ions based on complex formed with [4,5-dimercapto-1,3-dithyol-2-thionate] and posterior determination by flame atomic absorption spectrometry (FAAS). The preconc...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidade Estadual de Maringá
2013-04-01
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| Series: | Acta Scientiarum: Technology |
| Subjects: | |
| Online Access: | http://periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/18076 |
| Summary: | <p class="aresumo">The present study proposes a new method for cloud point preconcentration of Pb<sup>2+</sup> ions based on complex formed with [4,5-dimercapto-1,3-dithyol-2-thionate] and posterior determination by flame atomic absorption spectrometry (FAAS). The preconcentration of Pb<sup>2+</sup> was carried at pH 5.0 under following conditions: time and temperature of batch at 15 min. and 70<sup>o</sup>C, respectively, 0.1% (v/v) Triton X-114, 0.003 mol L<sup>-1</sup> acetate/acetic acid buffer solution, 1.0 x 10<sup>-5</sup> mol L<sup>-1</sup> DMIT and 0.5% (m/v) NaCl. Under the best analytical conditions the method provided a limit of detection of 2.85 mg L<sup>-1</sup> by preconcentrating 10.0 mL of sample and calibration curve ranging from 0 up to 650 mg L<sup>-1</sup> (r = 0.99945). The applicability of proposed method for Pb<sup>2+</sup> determination in natural waters without interferences was checked through addition/recovery tests.</p> <p class="akeyword"> </p> |
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| ISSN: | 1806-2563 1807-8664 |