Determination of brilliant green from fish pond water using carbon nanotube assisted pseudo-stir bar solid/liquid microextraction combined with UV–vis spectroscopy–diode array detection

Es’haghi, Zarrin; Khooni, Maliheh Ahmadi-Kalateh; Heidari, Tahereh

doi:10.1016/j.saa.2011.03.042

Cited by 52 publications

(19 citation statements)

References 21 publications

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“…The addition of salt improves the extraction efficiency in many conventional extraction processes. Because the organic acceptor/aqueous donor phase distribution coefficient can be enhanced by increasing the ionic strength of the aqueous sample . To investigate the influence of ionic strength on the performance of the extraction, various concentrations of sodium chloride (NaCl, 0–5%, w/v) were studied.…”

Section: Resultsmentioning

confidence: 99%

Development of carbon-nanotube-assisted electromembrane extraction in the two-phase mode combined with GC for the determination of basic drugs

2013

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In this work, carbon-nanotube-assisted electromembrane extraction in the two-phase mode combined with GC was developed for the preconcentration and determination of basic drugs in body fluids. The multiwalled carbon nanotubes dispersed in organic solvent are held in the pores of the porous fiber wall by capillary forces and sonification. The membrane with immobilized carbon nanotubes acts as a sorbent and provides an additional pathway for analyte transport. This study demonstrates that the immobilization of carbon nanotubes in the supported liquid membrane is an excellent approach to enhance the performance of the extraction. Optimization of the variables affecting this method was carried out in order to achieve the best extraction efficiency. Optimal extractions were accomplished with octanol as the extraction solvent, 50 V as the driving force and pH 7.4 in the sample solution with the whole assembly agitated at 1000 rpm for 20 min. Under the optimized extraction conditions, the proposed technique provided good linearity (R(2) > 0.9990), repeatability (3.5-3.8%), low LODs (1.5 ng/mL), good preconcentration factors (292-316) and high recoveries (80-87%). Finally, this method was successfully used for the determination of tramadol and methadone in different body fluids including plasma and urine samples.

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Section: Resultsmentioning

confidence: 99%

Development of carbon-nanotube-assisted electromembrane extraction in the two-phase mode combined with GC for the determination of basic drugs

2013

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“…9,12,19,[33][34][35] The most relevant results are shown in Table 6. As it can be observed, those methods based on the use of DSPME with spectrophotometry (UV-Vis) present the lowest limits of detection.…”

Section: Comparison Of the Presented Procedures With Other Methodsmentioning

confidence: 99%

Synthesis and characterization of ZnO-nanorods loaded onto activated carbon and its application for efficient solid phase extraction and determination of BG from water samples by micro-volume spectrophotometry

et al. 2015

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“…In the same way, Es'haghi et al recently proposed carbon nanotubes-assisted pseudo-stirbar solid-liquid microextraction in which a special stir-bar, shown schematically in Fig. 7, is used [61]. In this technique a polypropylene hollow fiber is used as support, and a dispersion of carbon nanotubes in an appropriate solvent, located in its lumen and pores, is used as extractant.…”

Section: Novel Stirring/extraction Integrated Devices For Liquid-phasmentioning

confidence: 99%

Extraction and stirring integrated techniques: examples and recent advances

Lucena

2012

Anal Bioanal Chem

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Extraction techniques, which focus on selectivity and sensitivity enhancement by isolation and preconcentration of target analytes, are essential in many analytical methods. Because many extraction techniques occur under diffusion-controlled conditions, stirring of the sample solution is required to accelerate the extraction by favoring diffusion of the analytes from the bulk solution to the extractant phase. This stirring may be performed by use of an external device or by integrating extraction and stirring in the same device. This review focuses on the latter techniques, which are promising methods for sample treatment. First, stir-bar-sorptive extraction, the most widely used method, is considered, paying special attention to the development of new coatings. Finally, a general overview of novel integrated techniques in both solid-phase and liquid-phase microextraction is presented; their main characteristics and marked trends are reported.

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Determination of brilliant green from fish pond water using carbon nanotube assisted pseudo-stir bar solid/liquid microextraction combined with UV–vis spectroscopy–diode array detection

Cited by 52 publications

References 21 publications

Development of carbon-nanotube-assisted electromembrane extraction in the two-phase mode combined with GC for the determination of basic drugs

Development of carbon-nanotube-assisted electromembrane extraction in the two-phase mode combined with GC for the determination of basic drugs

Synthesis and characterization of ZnO-nanorods loaded onto activated carbon and its application for efficient solid phase extraction and determination of BG from water samples by micro-volume spectrophotometry

Extraction and stirring integrated techniques: examples and recent advances

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