Facile and Sensitive Spectrophotometric Determination of Carbosulfan in Formulations and Environmental Samples |
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Authors: | K Suresh Kumar K Suvardhan D Rekha K Kiran G Chalapathi Rao B Jayaraj K Janardhanam P Chiranjeevi |
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Institution: | (1) Environmental Monitoring Laboratory, Department of Chemistry, S.V. University, Tirupati, 517 502, AP, India;(2) Department of Environmental Sciences, S.V. University, Tirupati, 517 502, AP, India;(3) Department of Mathematics, S.V. University, Tirupati, 517 502, AP, India |
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Abstract: | Facile, selective and sensitive spectrophotometric method has been developed for the determination of carbosulfan in insecticidal
formulations, fortified water, food grains, agriculture wastewater and soil samples with newly synthesized reagents. The method
was based on acid and alkaline hydrolysis of the carbosulfan pesticide, and the resultant hydrolysis product of carbosulfan
was coupled with 2,6-dibromo-4-methylaniline to give a yellow color product with λ
max of 464 nm or interaction with 2,6-dibromo-4-nitroaniline to produce yellow colored product with λ
max of 408 nm or coupling with 2,4,6-tribromoaniline to form red colored product has a λ
max of 471 nm. Under optimal conditions, Beer’s law range for 2,6-dibromo-4-methylaniline (DBMA) was found to be 0.2–12.0 μg
ml−1, 0.6–16.0 μg ml−1 for 2,6-dibromo-4-nitroaniline (DBNA) and 0.4–15.0 μg ml−1 for 2,4,6-tribromoaniline (TBA). The molar absorptivity of the color systems were found to be 3.112 × 104 l mol−1 cm−1 for DBMA, 3.214 × 104 l mol−1 cm−1 for DBNA and 3.881 × 104 l mol−1 cm−1 for TBA. Sandell’s of the color reactions are 0.013 μg cm−2 (DBMA), 0.012 μg cm−2 (DBNA) and 0.011 μg cm−2 (TBA) respectively. The effect of the non-target species on the determination of carbosulfan was studied to enhance the selectivity
of the proposed methods. The formation of colored derivatives with the coupling agents is instantaneous and stable for 28,
30, and 26 h. Performance of the proposed methods were compared statistically in terms Student’s F and t-tests with the reported methods.
An erratum to this article can be found at |
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Keywords: | Carbosulfan 2 6-Dibromo-4-methylaniline 2 6-Dibromo-4-nitroaniline 2 4 6-Tribromoaniline Spectrophotometry Water Grains Environmental samples |
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