Author(s):
Kalpana Wani, Prashant Mundeja, Mamta Nirmal, Vindhiya Patel, Raisa Khatoon, Ajay Kumar Sahu, Deepak Kumar Sahu, Manish Kumar Rai, Joyce Rai, Pushpy Michael
Email(s):
mkjkchem@gmail.com , kalpanawani1008@gmail.com
Address:
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.
Published In:
Volume - 30,
Issue - 1,
Year - 2017
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.
Journal of Ravishankar
University-B, 30 (I &II), 66-73 (2017)
A Rapid and
Accurate Non Extractive Procedure For Analyzing Monocrotophos In Environmental
Samples By Spectrophotometry
Kalpana Wani, Prashant
Mundeja, Mamta Nirmal, Vindhiya Patel, Raisa Khatoon, Ajay Kumar Sahu, Deepak
Kumar Sahu, Manish Kumar Rai, Joyce Rai and Pushpy Michael
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
Corresponding author:mkjkchem@gmail.com,
kalpanawani1008@gmail.com
[Received 15 January 2018; accepted 9 February 2018]
Abstract: 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.
Keywords: Bromine, Environmental
samples, Leuco malachite green, Monocrotophos, Spectrophotometry
NOTE:
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