5 Choice of Solvent in Liquid-Phase Microextraction

Dadfarnia, Shayessteh; Hajishabani, Ali Mohammad

doi:10.2478/9783110410181.5

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…Up to now, the traditional LLE, ultrasound‐assisted cloudpoint extraction, and various LPME methods have been developed for the extraction of benzimidazole compounds. In comparison with other liquid‐phase extraction methods, LPME methods have the advantages of ease of operation, low cost, low consumption of organic solvents, and the possibility of obtaining a high enrichment factor. So far, different modes of LPME including dispersive liquid–liquid microextraction, single drop microextraction, solidified floating organic drop microextraction, vortex‐assisted emulsification microextraction, ultrasound‐assisted emulsification microextraction, and hollow‐fiber liquid‐phase microextraction (HF‐LPME) have been developed and used for the extraction of various compounds.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous extraction and quantification of albendazole and triclabendazole using vortex‐assisted hollow‐fiber liquid‐phase microextraction combined with high‐performance liquid chromatography

Asadi

Shabani

Dadfarnia

2016

J of Separation Science

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A novel, simple, and rapid vortex-assisted hollow-fiber liquid-phase microextraction method was developed for the simultaneous extraction of albendazole and triclabendazole from various matrices before their determination by high-performance liquid chromatography with fluorescence detection. Several factors influencing the microextraction efficiency including sample pH, nature and volume of extraction solvent, ionic strength, vortex time, and sample volume were investigated and optimized. Under the optimal conditions, the limits of detection were 0.08 and 0.12 μg/L for albendazole and triclabendazole, respectively. The calibration curves were linear in the concentration ranges of 0.3-50.0 and 0.4-50.0 μg/L with the coefficients of determination of 0.9999 and 0.9995 for albendazole and triclabendazole, respectively. The interday and intraday relative standard deviations for albendazole and triclabendazole at three concentration levels (1.0, 10.0, and 30.0 μg/L) were in the range of 6.0-11.0 and 5.0-7.9%, respectively. The developed method was successfully applied to determine albendazole and triclabendazole in water, milk, honey, and urine samples.

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Section: Introductionmentioning

confidence: 99%

Simultaneous extraction and quantification of albendazole and triclabendazole using vortex‐assisted hollow‐fiber liquid‐phase microextraction combined with high‐performance liquid chromatography

Asadi

Shabani

Dadfarnia

2016

J of Separation Science

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“…29,40,41 Thus, in some cases a decrease in the extraction efficiency at a high concentration of salt has been reported, which is related to the increase in the sample viscosity and the restriction of the transport of the analyte to the organic phase. Therefore, in order to investigate the effect of salt on the USAE-SFODME performance, several experiments were performed with different NaCl concentrations (0.0-0.07 mol L −1 ) while keeping the other experimental parameters constant.…”

Section: −39mentioning

confidence: 99%

“…The lower the ratio of the volume of organic phase to the aqueous phase, the higher the enrichment factor, but a low volume ratio may reduce the extraction efficiency in a given extraction time. For this purpose, different volumes of 1-undecanol (10,20,30,40,50, 60, 70 µ L) were subjected to USAE-SFODME under constant conditions of the other variables, the final extract was diluted to 100 µ L, and the concentration of palladium was determined by FI-FAAS. The results shown in Figure 5 indicate that by increasing the volume of 1-undecanol up to 20 µ L, the extraction efficiency was increased and leveled off at a higher volume of the extracting solvent.…”

Section: Effect Of Solvent Volume On Extractionmentioning

confidence: 99%

Ultrasound-assisted emulsification--solidified floating organic drop microextraction combined with flow injection--flame atomic absorption spectrometry for the determination of palladium in water samples

Dadfarnia

Shabani²,

Amirkavei³

2013

Turk J Chem

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Abstract:The ultrasound-assisted emulsification-solidified floating organic drop microextraction (USAE-SFODME) methodology was combined with flow injection-lame atomic absorption spectrometry (FI-FAAS) for the separation/preconcentration and determination of palladium at ultratrace level. In this method, the palladium ion in the aqueous solution was complexed with acetylacetone (6 × 10 −3 mol L −1 ) in the pH range of 1-7 and was extracted into 40 µ L of 1-undecanol, which was sonically dispersed in the aqueous phase. The vial was then centrifuged and cooled in an ice bath for 5 min. The solidified extract was melted and diluted to 100 µ L with a solution of hydrochloric (1 mol L −1 ) acid in ethanol, and the concentration of palladium was determined by FI-FAAS. Under the optimum conditions, an enhancement factor of 55 and a good relative standard deviation of ± 2.1% at 40 µ g L −1 were obtained (n = 7).The proposed method was successfully applied to the determination of palladium in different types of water samples.Accuracy was assessed through recovery experiments, independent analysis by furnace atomic absorption spectrometry, and analysis of a certified reference ore by the proposed method.

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