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篇名
Ionic liquid-based hollow fiber-supported liquidphase microextraction enhanced electrically for the determination of neutral red
並列篇名
Ionic liquid-based hollow fiber-supported liquidphase microextraction enhanced electrically for the determination of neutral red
作者 Shi-Ru Wang (Shi-Ru Wang)Sui Wang (Sui Wang)
英文摘要
A method of ionic liquid-based hollow fiber liquid-phase microextraction enhanced electrically was successfully developed and applied to the extraction and determination of neutral red (NR) dye, which was selected as the model analyte. A room temperature ionic liquid, 1-octyl-3-methylimidazolium hexafluorophosphate ([C8mim][PF6]), was placed in the pores of a polytetrafluoethylene hollow fiber, which acts as a liquid membrane and the acceptor solution. The extraction parameters affecting the enrichment factor of NR, such as pH, extraction time, elution time, stirring rate, and the voltage were optimized. In addition, UVeVisible (UVeVis) or electrochemiluminescence spectra were also determined. The extraction rate and capacity of NR could be improved significantly by cathodic polarization. Under the optimized extraction conditions (organic liquid microextraction phase [C8mim][PF6], pH 7, stirring rate 300 rpm, extraction time 20 minutes, ultrasonicassisted elution time 3 minutes, voltage 70 V), the detection limit of 0.38 mg/L and linear correlation coefficient of r > 0.99 were obtained. The established method was successfully applied to the analysis of three soft drink samples, which were spiked with NR standards at the concentrations of 0.1, 1.0, and 5.0 mg/L, and satisfactory results were obtained.
起訖頁 418-424
關鍵詞 ElectrochemiluminescenceHollow fiberIonic liquidLiquid-phase microextractionNeutral red
刊名 JOURNAL OF FOOD AND DRUG ANALYSIS  
期數 201410 (22:4期)
出版單位 衛生福利部食品藥物管理署
該期刊-上一篇 Potentiometric monitoring of cobalt in beer sample by solid contact ion selective electrode
該期刊-下一篇 Sulfur compounds identification and quantification from Allium spp. fresh leaves
 

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