Citation:
LI Xiang-Ping, QI Jian-Ying, CHEN Yong-Heng. Determination of Dichloroacetic Acid,Trichloroacetic Acid and Glyphosate in Environmental Water by Ion Chromatography with Large Volume Direct Injection[J]. Chinese Journal of Applied Chemistry,
;2009, 26(4): 447-450.
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A novel method was developed for the determination of dichloroacetic acid,trichloroacetic acid and glyphosate in environmental water by ion chromatography with large volume direct injection.With a high capacity anion exchange column,IonPac AS9-HC column,and 25 mmol/L sodium carbonate and 2 mmol/L sodium hydroxide as eluent,the glyphosate could be well separated from trichloroacetic acid,and dichloroacetic acid could be well separated from other anions(such as F-,Cl-,NO3-,SO42-),too,and they can be determined within 22 min at a flow rate of 1.0 mL/min.A 500 μL sample loop was used.The detection limits for dichloroacetic acid,trichloroacetic acid and glyphosate were 0.005 mg/L,0.014 mg/L,and 0.03 mg/L respectively.The recoveries of the method for glyphosate,DCAA,and TCAA were between 92.6%~103.9%.The new method was applied to detecting dichloroacetic acid,trichloroacetic acid and glyphosate in river water and treated water samples of Canton with satisfactory result.
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