Simple and fast spectrophotometric determination of low levels of thiabendazole residues in fruit and vegetables after pre-concentration with ionic liquid phase microextraction

Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
Nail AltunayRamazan Gürkan

Abstract

There is a great importance of monitoring thiabendazole (TBZ) residues in fruits and vegetables to ensure food safety. Therefore, a new ionic liquid (IL) phase microextraction method using IL, 1-butyl-3-methylimidazoliumhexafluorophosphate [C4mim][PF6], as extracting solvent is proposed for simple and fast determination of low levels of TBZ in fruits and vegetables by spectrophotometry. The method is based on selective complex formation of TBZ with Cu(II) ions in presence of PF6- as counter ion at pH 5.5, and then microextraction of the complex into the fine micro-drops of IL phase. After optimisation of variables affecting microextraction efficiency, the analytical parameters of the method were determined by calibration curves. The method exhibits a linear relationship (0.3-280 μg L-1), low detection limit (0.1 μg L-1), good intra- and inter-day precision (2.4-4.5% as RSDr%, 2.1-5.6% as RSDR%), good recovery (≥95.1-98.2%) and high sensitivity enhancement factor (150) by solvent-based calibration curve. It allows a detection limit of 0.24 μg L-1 and a range of 0.8-250 μg L-1 by the matrix-matched calibration curve. After validation, the method was successfully applied to the determination of TBZ residues with method quantificat...Continue Reading

References

Mar 4, 2008·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Yanxue HuZhi Wang
Jun 30, 2009·Talanta·Bienvenida Gilbert-LópezAntonio Molina-Díaz
Feb 26, 2010·Journal of Chromatography. a·Francisco BarahonaKnut Einar Rasmussen
May 14, 2011·Analytica Chimica Acta·Francisco BarahonaAntonio Martín-Esteban
Oct 16, 2012·Journal of Separation Science·Esther Turiel, Antonio Martín-Esteban

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Citations

Jun 25, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Yifan WangJinkai Xue
Apr 17, 2020·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Nail AltunayAdil Elik

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Methods Mentioned

BETA
Raman
electrophoresis

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