Abstract
A method for simultaneous determination of glufosinate, glyphosate and 5 phenoxyalkanoic acid herbicides (MCPA, MCPB, MCPP, 2,4-D, 2,4,5-T) in river water was studied. 50ml of river water was passed through a cation-exchange cartridge and an anion-exchange cartridge. The herbicides were eluted from the anion-exchange cartridge with 60% acetic acid, derived with trimethyl orthoacetate and measured by GC/MS-SIM.
The detection limits of glufosinate, glyphosate and 5 phenoxyalkanoic acids were 0.0003, 0.0002 and 0.0001-0.0005mg·l-1 respectively. When 0.005mg·l-1 of each herbicide was added to a river water, the recoveries from the water were 112.7, 90.0 and 71.0-100.3% for glufosinate, glyphosate and 5 phenoxyalkanoic acids respectively.
