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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. shu

Determination of Dichloroacetic Acid,Trichloroacetic Acid and Glyphosate in Environmental Water by Ion Chromatography with Large Volume Direct Injection

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a Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou;
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b South China Institute of Environmental Sciences MEPA, Guangzhou;
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c School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006

Corresponding author: CHEN Yong-Heng,
Received Date: 2 April 2008
Available Online: 26 June 2008
Fund Project: 国家自然科学基金-广东省人民政府联合基金(U0633001) (U0633001)中央级科研院所公益性基金(zx20080909)资助项目 (zx20080909)

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^-,SO₄^2-),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.
- ion chromatography,
- dichloroacetic acid,
- trichloroacetic acid,
- glyphosate,
- environmental water
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