標題: Analysis of acidic herbicides in water using a toroidal coil CCC
作者: Huang, YL
Yu, T
應用化學系
Department of Applied Chemistry
關鍵字: toroidal coil centrifuge;countercurrent chromatography;acidic herbicides;humic substances
公開日期: 2003
摘要: A newly developed compact toroidal coil centrifuge chromatograph (TCCC) has been proven to be able to achieve high-resolution counter-current chromatography (CCC) separations. The potential of this devise is studied for analytical applications. The TCCC was used for the analysis of acidic herbicides in order to reduce the interference due to humic substances. Aqueous samples were pretreated with solid-phase extraction (SPE) and eluted with the lower phase of an n-hexane-ethyl acetate-water (15: 7: 20, v/v/v) solvent system. Because the humic substances were more hydrophilic than the herbicides, they were eluted first and separated from the herbicides. Although four herbicides were well resolved,. quantification of compound 2,4-dichloro-phenoxyacetic acid was, to some extent affected by the tailing signal of humic substances. Samples of analytes of 20 mug/L spiked in deionized water containing 6 and 12 mg/L humic acid, and in lake water, were analyzed. Mean recoveries ranged between 66 and 96%, with RSDs between 2 and 11%. While CCC has been known as a preparative chromatographic technique, the potential of using a TCCC device for quantitative analysis under complex matrices is demonstrated.
URI: http://hdl.handle.net/11536/28283
http://dx.doi.org/10.1081/JLC-120021272
ISSN: 1082-6076
DOI: 10.1081/JLC-120021272
期刊: JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
Volume: 26
Issue: 9-10
起始頁: 1637
結束頁: 1648
顯示於類別:會議論文


文件中的檔案:

  1. 000183976100020.pdf

若為 zip 檔案,請下載檔案解壓縮後,用瀏覽器開啟資料夾中的 index.html 瀏覽全文。