A new liquid-phase microextraction method based on solidification of floating organic drop

Zanjani, Mohammad Reza Khalili; Yamini, Yadollah; Shariati, Shahab; Jönsson, Jan Åke

doi:10.1016/j.aca.2006.12.049

Cited by 483 publications

(128 citation statements)

References 47 publications

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“…The method is a modified solvent extraction method. 21 Dadfarnia and co-workers 12,22,23 extended its application to inorganic analysis. In SFODME, no specific holders, like the microsyringe needle tip, the hollow fiber or the polychloroprene rubber (PCR) tube, are required for supporting the organic microdrop due to the low density and proper melting point of organic solvent.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Zhang

Wang

et al. 2011

J. Braz. Chem. Soc.

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Uma técnica de microextração em fase líquida foi desenvolvida para a extração e determinação de quantidades traço de íons cádmio em amostras de água. A emulsificação-microextração assistida por ultrasom através da gota orgânica flutuante solidificada (USAE-SFODME) foi empregada para a extração e a espectrometria de absorção atômica com chama (FAAS) foi empregada para a determinação de Cd. Foram investigados e otimizados os fatores que influenciam na eficiência da técnica de microextração, tais como tipo e volume de solvente, tempo, temperatura, pH, quantidade do agente quelante e efeito da concentração de cloreto de sódio. Usando as condições otimizadas, um fator do enriquecimento de 81,0 foi obtido para um volume de 6,0 mL de amostra de água. A curva analítica de calibração mostrou-se linear no intervalo de 10-450 mg L -1 com um limite de detecção (LOD) igual a 0,66 mg L -1 de Cd. Os desvios padrão relativos (RSD) para dez replicatas de soluções contendo 20 e 300 mg L -1 de Cd foram 3,34% e 2,42%, respectivamente. O método proposto foi avaliado pela determinação de Cd em material de referência certificado de água ou através de experimentos de adição e recuperação.A liquid-phase microextraction technique was developed using ultrasound-assisted emulsification solidified floating organic drop microextraction (USAE-SFODME) combined with flame atomic absorption spectrometry (FAAS) for the extraction and determination of trace cadmium in water samples. Microextraction efficiency factors, such as extraction solvent type and extraction volume, time, temperature, pH, the amount of the chelating agent, and salt effect, were investigated and optimized. Under optimum conditions, an enrichment factor of 81.0 was obtained for 6.0 mL of water sample. The calibration graph was linear in the range of 10-450 mg L -1 with a detection limit of 0.66 mg L -1 . The relative standard deviations (RSD) for ten replicate measurements of 20 and 300 mg L -1 of Cd were 3.34% and 2.42%, respectively. The accuracy of the proposed method was assessed either by determination of Cd in a certified reference material of water or by addition-recovery experiments.

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Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Zhang

Wang

et al. 2011

J. Braz. Chem. Soc.

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“…In 2007, Rezaee et al [60,61] introduced a new mode of liquid phase microextraction based on solidification of floating organic solvent (LPME-SFO). In this method, the specific holder was not required for supporting the organic microdrop, and stirring of the solution at very high speed was possible because of using organic solvent with low density and proper melting point.…”

Section: Solidification Of Floating Organic Drop-dllme (Sfo-dllme)mentioning

confidence: 99%

Recent Advances in Dispersive Liquid - Liquid Microextraction for Organic Compounds Analysis in Environmental Water: A Review

Ma¹,

Lü²,

Chen

2012

CAC

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Dispersive liquid-liquid microextraction (DLLME) is a novel microextraction technique with a great potential in sample pretreatment, which has been increasingly used for preconcentration of diverse analytes. This review updates the state of the art and discusses promising prospects of DLLME, especially focuses on its combined use with chromatographic techniques for organic compounds analysis in environmental water samples. General and specific concepts of the fundamental theory of DLLME are described, and examples of recent innovations and applications are provided to demonstrate its potential for the determination of a wide range of organic compounds in various water matrices. Moreover, some limitations related to DLLME are also discussed in detail, and an outlook on the future of the technique, specifically its coupling with other pretreatment approaches, separation and detection techniques, is also given.

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“…Liquid phase microextraction based on solidification of floating organic drop (LPME-SFO) is one the newest versions of LPME (Khalili-Zanjani et al, 2007) in which the extraction solvent with lower density than water, low toxicity and proper melting point near room temperature (in the range of 10-30 ˚C) was used. In this method, small volume of an extraction solvent is floated on the surface of aqueous solution.…”

Section: Liquid Phase Microextraction Based On Solidification Of Floamentioning

confidence: 99%

Microextraction Techniques as a Sample Preparation Step for Metal Analysis

Biparva¹,

Matin²

2012

Atomic Absorption Spectroscopy

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A new liquid-phase microextraction method based on solidification of floating organic drop

Cited by 483 publications

References 47 publications

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Recent Advances in Dispersive Liquid - Liquid Microextraction for Organic Compounds Analysis in Environmental Water: A Review

Microextraction Techniques as a Sample Preparation Step for Metal Analysis

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