Solvent Extraction, Preconcentration and Determination of Thorium with Monoaza 18-Crown-6 Derivative
Solvent Extraction, Preconcentration and Determination of Thorium with Monoaza 18-Crown-6 Derivative
i.Dolak(University of Dicle); M. Karakaplan(University of Dicle); Ziyadano ullar(University of Dicle); Ziyadano ullari(Department of Chemistry, Faculty of Science, University of Dicle)
32권 5호, 1564~1568쪽
초록
A solvent extraction separation, preconcentration and determination of thorium with a new crown, 2-ethyl-Nbenzyl-4,7,10,13,16-pentaoxa-1-azacyclooctadecane (MACE), is described in the study. The amount of thorium in the aqueous phase and organic phase was determined by Inductively Coupled Plasma-Optical Emission Spectroscopy and Ultraviolet-Visible, respectively. Thorium loaded organic phase was quantitatively stripped in a stage by using 1.0 M HNO_3. Thorium was effectively extracted with MACE in the pH range of 6-7 to produce a 3:2 complex ratio in the chloroform. A highly sensitive and rapid spectrophotometric method was described for determination of trace amounts of thorium with MACE. The effective molar absorption coefficient at 281 nm is 1.98 × 10^3 mol^−1 cm^−1, and the system complies with Beer’s law in the range from 0.464to 2.32 μg mL^−1 of thorium. Thorium was also determined in standard and environmental samples.
Abstract
A solvent extraction separation, preconcentration and determination of thorium with a new crown, 2-ethyl-Nbenzyl-4,7,10,13,16-pentaoxa-1-azacyclooctadecane (MACE), is described in the study. The amount of thorium in the aqueous phase and organic phase was determined by Inductively Coupled Plasma-Optical Emission Spectroscopy and Ultraviolet-Visible, respectively. Thorium loaded organic phase was quantitatively stripped in a stage by using 1.0 M HNO_3. Thorium was effectively extracted with MACE in the pH range of 6-7 to produce a 3:2 complex ratio in the chloroform. A highly sensitive and rapid spectrophotometric method was described for determination of trace amounts of thorium with MACE. The effective molar absorption coefficient at 281 nm is 1.98 × 10^3 mol^−1 cm^−1, and the system complies with Beer’s law in the range from 0.464to 2.32 μg mL^−1 of thorium. Thorium was also determined in standard and environmental samples.
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- 대한화학회
- 분류:
- 화학