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A liquid-liquid extraction (LLE) method consisting gas chromatography-mass spectrometric (GC-MS) determination of thirty six pesticides in environmental waters was standardized. The method was validated as per SANTE/11813/2017 guidelines. Effect of three seasons namely summer, monsoon and winter on monitoring of pesticide residues in environmental...
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... ground water (Tube-well sample) showed seasonal contamination due to rapid transport of soil holding pesticides in monsoon (butachlor and chlorpyrifos) with low water solubility and high Log K ow (octanal-water partition coecient) ( Yang et al. 2005;Masiá et al. 2013). Table 3 lists the physicochemical properties of the pesticides inspected. Although, in summer there is some reduction of water volume in river and pond for rising of temperature, ( Sharip et al. 2017;Kaushik et al. 2012) total-pesticide concentration was much higher in monsoon than summer and winter period (Fig. 5). ...