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Abstract : Paraquat concentrations have been determined, which is a herbicide (killer of broadleaf weeds) widely used in farms in the city of Mosul. It is dangerous because of its high acute toxicity even at low concentrations. Therefore, its discovery in the environment is necessary in different environmental samples, including water (Tigris River, Wadi Danfali, Al-Khawser River) and soil samples from different areas of farms on the left side of the city of Mosul (Sherikhan, Rashidiya, Muthanna, Al-Baath, Yaramjah) and plant samples from the same areas, which are (Potatoes, beans, coleslaw, beet) A sensitive spectrophotometric method was used in an alkaline medium, paraquat was reduced by glucose, and the resulting blue root ion was measured at 600 nm. The concentrations in water ranged between 1.891 (-3.174) ppm, in soil between (1.6008-4.3585) ppm and in plants 1.2612)- 6.226 (ppm), the results show that there are residues of paraquat pesticide in different environmental samples.

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