title: Analysis pesticides by chemical derivatization. III. Gas chromatographic characteristics and conditions for the formation of pentafluorobenzyl derivatives of ten herbicidal acids.
abstract: The reaction conditions to form pentafluorobenzyl derivatives of 10 herbicidal acids, at pesticide residue levels, were studied. The optimum conditions were reaction at room temperature for at least 5 hr (or overnight), using potassium carbonate solution as catalyst. The gas chromatographic characteristics of these derivatives were also studied. Nine of 10 of these derivatives can be separated on an OV-101/OV-210 gas chromatographic column.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D005464:Fluorobenzenes; D006540:Herbicides / Q000032:analysis*; D007202:Indicators and Reagents; D008722:Methods; D010573:Pesticide Residues / Q000032:analysis*
chemical_list: D005464:Fluorobenzenes; D006540:Herbicides; D007202:Indicators and Reagents; D010573:Pesticide Residues