National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
In the present investigation the organophosphorus insecticides viz., chlorpyrifos, dichlorvos, malathion, methyl parathion, monocrotophos, phosphamidon, profenofos, quinalphos and triazophos insecticides were assessed with different chromogenic reagents. Initial screening of the chromogenic reagents to detect organophosphorus insecticides was done through paper strip method. In paper strip method, development of yellow colour was observed for methyl parathion using sodium hydroxide as chromogenic reagent. Phosphamidon and quinalphos were detected by developing brown and white colour using silver nitrate and sodium hydroxide. The darkness of colour on the spot was increased with increased concentrations. The fortification studies were conducted to determine the methyl parathion, phosphamidon and quinalphos through paper strip method. The results reported that using sodium hydroxide yellow colour was appeared in methyl parathion residual extract. Where as in phosphamidon and quinalphos, the residual extract when treated with silver nitrate the colour obtained was not comparable with standards. Validation was done for methyl parathion using standards and residual extracts and the results were comparable with standards as well fortified residual extracts. From the above experimental results, a test kit was developed for methyl parathion residues detection. The developed test kit was used to determine the pesticide residues present in market vegetable samples.
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