Cloud Point Extraction of Carbendazim Pesticide in Foods and Environmental Matrices Prior to Visible Spectrophotometric Determination
Science Journal of Analytical Chemistry
Volume 4, Issue 3, May 2016, Pages: 30-41
Received: Apr. 13, 2016;
Accepted: Apr. 22, 2016;
Published: May 23, 2016
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Zuhair A-A Khammas, Department of Chemistry, College of Science for Women, University of Baghdad, Jadiyriah, Baghdad, Iraq
Suher Salah Ahmad, Department of Chemistry, College of Science for Women, University of Baghdad, Jadiyriah, Baghdad, Iraq
Two simple eco-friendly methods are described for nano-determination of carbendazim (MBC) pesticide in real samples. These methods are based on oxidation of MBC pesticide with Fe (III) ions in acidic medium. The formed Fe(II) ions reacts with potassium ferricyanide to form blue colored product (method A) which can easily be extracted into nonionic surfactant solution of Triton X-114 at cloud point temperature (CPT) of 55°C and MBC determined spectrophotometrically at absorption maximum of 685 nm with apparent molar absorptivity of 2.07x104 L mol-1 cm-1. The Method B is based on the reaction of the formed Fe (II) with 2, 2’-bipyridyl to form a stable orange colored complex which can also be extracted by Triton X-114 at the same CPT and MBC determined spectrophotometrically at absorption maximum of 521 nm with apparent molar absorptivity of 1.83x104 L mol-1 cm-1. Optimization of the experimental parameters was described and interferences study also examined. Under the optimum conditions established, the calibration graphs for MBC were linear in the range of 0.5-13 and 1-20 ng mL-1, giving the detection limits of 0.46 and 0.49 ng mL-1 with enrichment factors of 85.7 and 38.9 fold for method A and B respectively. The average percent recoveries in the real spiked samples were (97.86±1.06%) and (98.66±0.93%), giving a precision in terms of %RSD in the range of 1.25-2.97% and 0.37-1.42% for method A and B respectively. The proposed methods were applied to the determination of MBC in vegetables, orange, and water samples.
Zuhair A-A Khammas,
Suher Salah Ahmad,
Cloud Point Extraction of Carbendazim Pesticide in Foods and Environmental Matrices Prior to Visible Spectrophotometric Determination, Science Journal of Analytical Chemistry.
Vol. 4, No. 3,
2016, pp. 30-41.
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