Determination of three phenoxyacid herbicides in environmental water samples by the application of dispersive liquid-liquid microextraction coupled with micellar electrokinetic chromatography

• Authors: Yanling Ma , Yingying Wen , Jinhua Li , Hua Wang , Yangjun Ding , Lingxin Chen
• Languages of publication: EN

Abstracts

EN

Abstract An efficient method based on dispersive liquid-liquid microextraction coupled with micellar electrokinetic chromatography has been developed for determination of three phenoxyacid herbicides (PAs) of 2,4-dichlorophenoxybutyric acid (2,4-DB), dicamba and 2,4-dichlorophenoxyacetic acid (2,4-D), in environmental water samples. The types and volumes of extracting and dispersing solvents, ionic strength, extraction and centrifugation time and centrifugation speed were investigated. Successful separation of the three PAs was achieved within 7 min, by using the background electrolyte solution consisting of 10 mmol L−1 sodium tetraborate, 25 mmol L−1 sodium dodecyl sulfate and 15% (v/v) methanol, at pH 9.75. Excellent analytical performances were attained, such as good linear relationships (R ≥0.9993) between peak area and concentration for each PAs from 10–1000 ng mL−1, limits of detection of 1.56–1.91 ng mL−1, and intra-day precisions at two spiked levels in terms of migration time and peak area within the range of 0.22–0.42% and 3.88–6.39%, respectively. Enrichment factors of 2,4-DB, dicamba and 2,4-D were 180, 151 and 216, respectively. The method recoveries obtained at fortified 20.0, 50.0 and 100.0 ng mL−1 for lake, river and reservoir water samples varied from 67.91 to 119.07% with the relative standard deviation of 1.47–6.89%. Graphical abstract [...]

Keywords

EN

Dispersive liquid-liquid microextraction; Micellar electrokinetic chromatography; Phenoxyacid herbicides; Water samples

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2013
• Volume: 11
• Issue: 3
• Pages: 394-403

Dates

published

1 - 3 - 2013

online

28 - 12 - 2012

Contributors

author

Yanling Ma

author

Yingying Wen

author

Jinhua Li

• Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, P.R. China

author

Hua Wang

• College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, P.R. China

author

Yangjun Ding

• College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, P.R. China

author

Lingxin Chen

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Identifiers

DOI

10.2478/s11532-012-0173-4