Residual Determination of (Pyroxsulam 4.5%OD) in Iraqi Wheat and Field Soil Using QuEChERS / HPLC

Simple, accurate and sensitive method for determination the herbicide residues (Pyroxsulam 4.5 % OD) in wheat cultivar ( Iba 99) and cultivar (Abu Ghraib 3) and a field soil, a field trial was conducted during winter seasons of 2016-2017 at Abu Ghraib Research Station, the Agricultural Research Department, Ministry of Agriculture. A simple method QuEChERS includes extraction by acetonitrile for Pyroxsulam from (wheat, soil) after that clean up by dispersive solid phase extraction -with PSA, GCB and MgSO4. Using High performance liquid chromatography having UV/visible detector For the detection of herbicide residues. The two cultivars were similar in dissipation of pyroxsulam in wheat plant, where as the concentration rises to a higher value in fifth day with respect to cultivar (Abu Ghraib 3) and in fourth day with respect to cultivar ( Iba 99), the average recovery percentage of Pyroxsulam for wheat plant, was 100.4 % and 99.8 % for field soil. The average of relative standard deviation percentage of Pyroxsulam for wheat plant was 0.02 % and 0.04 % for field soil. Residue of pyroxsulam was not detected in harvest samples of wheat grain and field soil. Pyroxsulam could be considere as a good herbicide of low toxic and no residual effect on wheat and soil when used in the recommended dose and in optimal conditions in Iraq.