Kalpana Wani, Prashant Mundeja, Mamta Nirmal, Vindhiya Patel, Raisa Khatoon, Ajay Kumar Sahu, Deepak Kumar Sahu, Manish Kumar Rai, Joyce Rai, Pushpy Michael
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School of Studies in Chemistry
Pt. Ravishankar Shukla University, Raipur (Chhattisgarh), 492010, India
Chhattisgarh Council of science and Technology, MIG-25, Indravati Colony, Raipur (Chhattisgarh), 492007, India.
Volume - 30,
Issue - 1,
Year - 2017
An organophosphorous insecticide monocrotophos is increasingly being utilized in agriculture to control insects on a broad range of crops. In this study a new reaction system using spectrophotometric method for quantitative determination of monocrotophos is proposed. The method is based on the bromination of monocrotophos to form dibromomonocrotophos which react with Potassium iodide-Potassium iodate mixture in the presence of leuco malachite green (LMG) to form a water soluble greenish blue colored complex. The change in absorbance as a criterion of the bromination reaction progress was followed spectrophotometrically. To obtain t he maximum sensitivity the effective reaction variables were optimized. The absorbance maximum was observed at 620 nm. Under optimized experimental conditions calibration graph was linear over the range of 10.0-60.0 µg. The molar absorptivity of the colored system is 3.66×104 L mol-1 cm-1 and sandell’s sensitivity is 0.25×10-2 µg cm-2. The calculated detection limit was 0.44 µg mL-1. The interfering effect of various species was also investigated. The present method was successfully applied to the analysis of monocrotophos in different environmental and water samples.
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Cite this article:
Wani, Mundeja, Nirmal, Patel, Khatoon, Sahu, Sahu, Rai, Rai and Michael (2017). A Rapid and Accurate Non Extractive Procedure For Analyzing Monocrotophos In Environmental Samples By Spectrophotometry. Journal of Ravishankar University (Part-B: Science), 30(1), pp.66-73.DOI: https://doi.org/10.52228/JRUB.2017-30-1-8