Hollow fiber-based liquid–liquid–liquid micro-extraction with osmosis: I. Theoretical simulation and verification

Wu, Qian; Wu, Dapeng; Geng, Xuhui; Shen, Zheng; Guan, Yafeng

doi:10.1016/j.chroma.2012.05.087

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…Extraction time is another important factor influencing the extraction efficiency [ 31 , 32 ]. In this study, extraction time was evaluated in the range of 5–60 minutes, and the results are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Ionic liquid-based hollow fiber-supported liquid-phase microextraction enhanced electrically for the determination of neutral red

Wang¹,

Wang²

2014

Journal of Food and Drug Analysis

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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 ([Cmim][PF]), 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, UV-Visible (UV-Vis) 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 [Cmim][PF], pH 7, stirring rate 300 rpm, extraction time 20 minutes, ultrasonic-assisted elution time 3 minutes, voltage -70 V), the detection limit of 0.38 μg/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.

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Section: Resultsmentioning

confidence: 99%

Ionic liquid-based hollow fiber-supported liquid-phase microextraction enhanced electrically for the determination of neutral red

Wang¹,

Wang²

2014

Journal of Food and Drug Analysis

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Hollow fiber-based liquid–liquid–liquid micro-extraction with osmosis: II. Application to quantification of endogenous gibberellins in rice plant

Duan

et al. 2012

Journal of Chromatography A

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Hollow fiber-based liquid–liquid–liquid micro-extraction with osmosis: I. Theoretical simulation and verification

Cited by 2 publications

References 37 publications

Ionic liquid-based hollow fiber-supported liquid-phase microextraction enhanced electrically for the determination of neutral red

Ionic liquid-based hollow fiber-supported liquid-phase microextraction enhanced electrically for the determination of neutral red

Hollow fiber-based liquid–liquid–liquid micro-extraction with osmosis: II. Application to quantification of endogenous gibberellins in rice plant

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