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Solvent Extraction Preconcentration and

Dolak, M. Karakaplan

2026enthoriumsolvent extractionpreconcentrationcrown ethersspectrophotometryanalytical chemistry

Abstract

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This study describes a method for the solvent extraction, preconcentration, and determination of thorium using a novel crown ether derivative, 2-ethyl-N-benzyl-4,7,10,13,16-pentaoxa-1-azacyclooctadecane (MACE). The extraction effectiveness was evaluated by determining thorium concentrations in both the aqueous and organic phases through Inductively Coupled Plasma-Optical Emission Spectroscopy and Ultraviolet-Visible Spectroscopy, respectively. The results indicated that thorium could be effectively extracted with MACE at a pH range of 6-7, achieving a complex ratio of 3:2 in chloroform. Additionally, the thorium-loaded organic phase was quantitatively stripped with 1.0 M HNO3 in a single stage. A highly sensitive spectrophotometric method was developed for detecting trace thorium concentrations, demonstrating compliance with Beer’s law within the range of 0.464 to 2.32 µg mL−1, with an effective molar absorption coefficient at 281 nm of 1.98 × 10³ mol−1 cm−1. Furthermore, the method was successfully applied to determine thorium in both standard and environmental samples, highlighting its utility in monitoring thorium levels.

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@article{6f3177f3-1723-42c9-a408-cb6e8473aa71,
  title={Solvent Extraction Preconcentration and},
  author={Dolak and M. Karakaplan},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - Solvent Extraction Preconcentration and
AU  - Dolak
AU  - M. Karakaplan
PY  - 2026
LA  - en
ER  -

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