Preconcentration and spectrophotometric determination of mercury in water, food and hair samples through ionic-liquid induced micelle-mediated extraction

Gouda, Ayman A; Elsheikh, Ragaa; Hassan, Wafaa; Ibrahim, Sara H; Youssef, Amira

doi:10.21608/bfszu.2020.31952.1031

Preconcentration and spectrophotometric determination of mercury in water, food and hair samples through ionic-liquid induced micelle-mediated extraction

Articles in Press

Document Type : Original Article

Authors

¹ Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt

² Chemistry Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.

³ Analytical Chemistry Department, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt

⁴ Chemistry Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt

10.21608/bfszu.2020.31952.1031

Abstract

A new, eco-friendly, and rapid micelle-mediated preconcentration technique was described for trace mercury in water, food and hair samples perior to its spectrophotometric determination. The developed method depended on cloud point extraction supported with ionic liquid (IL-CPE) for extraction of mercury utilizing a nonionic surfactant (Triton X-114) and 1-hexadecyl-3-methylimidazolium chloride (C16MeImCl) ionic liquid, as an extracting phase in the presence of 5-benzyl-4-[4-methoxybenzylideneamino)-4H-1,2,4-triazole-3-thiol (BMBATT) as a new chelating agent at pH 7.0. The influence of varous analytical variables on improving the extraction performance was tested. In the range of 2.0-600 µg L−1, the calibration curve was linear with correlation coefficient of 0.9997. The detection limit and preconcentration factor were 0.4 µg L−1 and 100, respectively. The reliability and precision of the developed IL-CPE system as the relative standard deviation (RSD %) of 100 and 400 µg L−1 mercury were in the range 1.0 and 2.4%, respectively (n=10). The validity of the developed IL-CPE approach was confirmed by the analysis of certified reference materials (NIST-1641d mercury in natural water and NCS ZC81002B human hair). The applicability of proposed IL-CPE technique was demonstrated successfully by estimation of trace mercury in real water, food and hair samples.

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