Cloud Point Extraction Procedure for Preconcentration of Co2+, Ni2+ and Cu2+ from Water and Biological Samples Using a thiosemicarbazone Derivative as a Complexing Agent | ||
| Egyptian Journal of Chemistry | ||
| Article 21, Volume 64, Issue 7, July 2021, Pages 3431-3437 PDF (522.81 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2021.63390.3360 | ||
| Authors | ||
| Eman Erfan1; Wael I. Mortada* 2; Hala El Asmy3; M.M. El-Defrawy4 | ||
| 1Chemistry Department, Faculty of Science, Mansoura University, Mansoura | ||
| 2Urology and Nephrology center, Mansoura University Urology and Nephrology center, Mansoura University | ||
| 3Chemistry department, Faculty of Science, Mansoura University | ||
| 4Chemistry Department, Faculty of Science, Mansoura University, Egypt | ||
| Abstract | ||
| An accurate and simple preconcentration procedure was presented for cloud point extraction of Co2+, Ni2+ and Cu2+ from water, blood and urine samples. The procedure based on complexation of the metal ions with (E)-2-(2,4-dihydroxybenzylidene)-N-phenylhydrazine-1-carbothioamide (DHBPHC) and subsequent extraction into a surfactant-rich phase of Triton X-114. The optimized procedure (50 mL solution; pH 6; 1 × 10–4 mol L-1 of DHBPHC; 0.08% (v/v) Triton X-114) exhibits linear range up to 500 µg L-1 and limit of detection of 0.34, 0.94 and 0.83 µg L-1 for Co2+, Ni2+ and Cu2+, respectively. Most potentially interferants did not impact the extraction process. The procedure was applied for preconcentration and determination of Co2+, Ni2+ and Cu2+ in water, blood and urine by flame atomic absorption spectrometry. | ||
| Keywords | ||
| Cloud point extraction; metal ions; thiosemicarbazone; flame atomic absorption spectrometry | ||
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