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Vol. 28 No. 5 (2016): Vol 28 Issue 5

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Flotation-Dissolution Based Spectrophotometric Determination of Ethion

https://doi.org/10.14233/ajchem.2016.19395
Vindhiya Patel
School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492 010, India
Raisa Khatoon
School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492 010, India
Mamta Nirmal
School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492 010, India
Kalpana Wani
School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492 010, India
Manish Kumar Rai
School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492 010, India
Joyce Rai
Chhattisgarh Council of Science and Technology, MIG 25, Indravati Colony, Raipur-492 007, India

Corresponding Author(s) : Manish Kumar Rai

mkjk.chem@gmail.com

Asian Journal of Chemistry, Vol. 28 No. 5 (2016): Vol 28 Issue 5

Abstract

A simple and sensitive extractive spectrophotometric determination of organophosphorus insecticide ethion at trace levels based on flotation-dissolution method is presented. A molydophospho complex is formed when ethion is treated with ammonium molybdate in acidic medium. As an ion associate complex with methylene blue, the complex is present in between water and organic layers which is extracted and then dissolved with acetone. The greenish blue complex produced showed an absorption maximum at 660 nm. Beer’s law is found to be in the range of 0.5 to 0.16 μg/10 mL for ethion. The molar absorptivity is 6.0 × 105 mol L-1 cm-1 and Sandel’s sensitivity is 0.014 μg cm-2. The standard deviation and relative standard deviation were calculated and found to be 0.022 μg mL-1 and 3.5 %, respectively. The method has been applied sucessfully for the determination of ethion in water, soil, vegetables and grains.

Keywords

Ethion Spectrophotometry Flotation-dissolution method Organophosphate insecticide
Patel, V., Khatoon, R., Nirmal, M., Wani, K., Rai, M. K., & Rai, J. (2016). Flotation-Dissolution Based Spectrophotometric Determination of Ethion. Asian Journal of Chemistry, 28(5), 957–959. https://doi.org/10.14233/ajchem.2016.19395
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