Application of Deep Eutectic Solvent Modified Cotton as a Sorbent for Online Solid-Phase Extraction and Determination of Trace Amounts of Copper and Nickel in Water and Biological Samples
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- 作者：Mehdi Karimi ; Shayessteh Dadfarnia…
- 关键词：Deep eutectic solvent ; Cotton ; Online solid ; phase extraction ; Copper ; Nickel
- 刊名：Biological Trace Element Research
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：176
- 期：1
- 页码：207-215
- 全文大小：
- 刊物主题：Biochemistry, general; Biotechnology; Nutrition; Oncology;
- 出版者：Springer US
- ISSN：1559-0720
- 卷排序：176
文摘
Deep eutectic solvent (DES) was used as the extractant to improve the extraction properties of cotton. DES of choline chloride-urea (ChCl-urea) was prepared and immobilized on the surface of cotton fibers. The resulting sorbent was packed on a microcolumn, and a flow injection flame atomic absorption spectrometry was designed for the online separation and determination of trace amounts of copper and nickel. Various parameters affecting the extraction recovery of analytes such as pH, sample volume, sample loading rate, nature, volume, concentration, and flow rate of eluent were investigated and optimized. Under the optimum conditions, the method showed good linearity in the concentration range of 0.25–50.0 and 4.0–125.0 μg L−1 with the coefficient of determination (r2) of 0.9991 and 0.9990 for copper and nickel, respectively. The method was very sensitive with the detection limits (defined as 3Sb/m) of 0.05 and 0.60 μg L−1 for Cu and Ni, respectively. It was successfully applied for the determination of Cu and Ni in water and biological samples. The accuracy of the method was evaluated through the recovery experiments and independent analysis by electrothermal atomic absorption spectrometry.