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Vol. 30 No. 7 (2018): Vol 30 Issue 7

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Quantification of Pyrethroid Residue in Food, Agricultural and Biological Samples

https://doi.org/10.14233/ajchem.2018.21240
Madhurani Shukla
Department of Chemistry, Government College, Gobra Nawapara-493 881, India
Kishore K. Tiwari
Department of Chemistry, Government Nagarjuna P.G. College of Science, Raipur-492 010, India

Corresponding Author(s) : Madhurani Shukla

shukla.madhu55@gmail.com

Asian Journal of Chemistry, Vol. 30 No. 7 (2018): Vol 30 Issue 7

Abstract

A simple and highly sensitive spectrophotometric method has been developed for the quantification of broadly used pyrethroid pesticides i.e. cypermethrin and fenvalerate. The developed method is based on alkaline hydrolysis of these pyrethroid pesticides to cyanide ion. The cyanide ion is further react with potassium iodide in acidic medium to liberate iodine and this liberated iodine oxidizes leucomalachite green to malachite green. The absorption maximum of the formed dye is measured at 600 nm. Beer’s law is obeyed in the concentration range of 0.08-0.72 and 0.16-0.88 μg/mL for cypermethrin and fenvalerate, respectively. The molar absorptivity and Sandell’s sensitivity were found to be 5.90 × 105 L mol-1 cm-1 and 0.00070 μg cm-2 for cypermethrin and 3.81 × 105 L mol-1 cm-1 and 0.0011 μg cm-2 for fenvalerate pesticides. The developed method has been satisfactorily applied for the determination of cypermethrin and fenvalerate in their formulations and various food, agricultural and biological samples.

Keywords

Spectrophotometer pH meter Leucomalachite green Pyrethroid pesticides Food Agricultural & Biological samples
Shukla, M., & Tiwari, K. K. (2018). Quantification of Pyrethroid Residue in Food, Agricultural and Biological Samples. Asian Journal of Chemistry, 30(7), 1546–1550. https://doi.org/10.14233/ajchem.2018.21240
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