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A Novel Method for the Assessment of Methyl Parathion by Using Coupling Agents in Environmental and Commercial Samples

✍ Scribed by Padmarajaiah Nagaraja; Besagarahally L. Bhaskara

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
86 KB
Volume
4
Category
Article
ISSN
1612-1872

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✦ Synopsis

Abstract

A sensitive and rapid spectrophotometric method for the determination of reduced methyl parathion (=O,O‐dimethyl O‐(4‐nitrophenyl) phosphorothioate) is described. The method is based on the interaction of diazotized reduced methyl parathion with 8‐hydroxyquinoline (=quinolin‐8‐ol; 8‐HQ) and 3‐aminophenol (3‐AP) as new coupling agents. Absorbances of the resulting chromophores are measured at 430 and 440 nm, respectively, and colored products were stable for at least 2 days. Beer's law is obeyed over the methyl parathion concentration range 0.2–5.5 μg ml^−1^ for 8‐HQ and 0.5–6.0 μg ml^−1^ for 3‐AP. From the data, it was confirmed that the two coupling agents can be effectively applied for the determination of methyl parathion in environmental and commercial samples.

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