Dissolved carbon dioxide flotation: An effective way for phase separation in emulsification microextraction method

Molaei, Saeideh; Saleh, A. K. Md. Ehsanes; Ghoulipour, Vanik; Seidi, Shahram

doi:10.1016/j.chroma.2015.01.090

Cited by 22 publications

(8 citation statements)

References 33 publications

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“…Carbon dioxide flotation presented by Molaei in 2016 was employed in this work as an alternative to centrifugation for emulsion‐breaking and separation of extraction solvent with some modification, especially in extraction method. The common ultrasound‐assisted emulsification microextraction cell used in this work, is simpler to work than the designed cells in DCF‐EME by Molaei or in HLLME‐FA .…”

Section: Resultsmentioning

confidence: 99%

“…Recently, Molaei et al. reported a fast technique named dissolved carbon dioxide flotation after emulsification microextraction (DCF‐EME) method in which carbon dioxide was generated in situ in the sample solution using the reaction between saturated sodium bicarbonate (NaHCO 3 ) solutions with acidified sample solution . In DCF‐EME, the necessity for a gas generator set up and fine adjustment of gas pressure for reproducible retrieving of organic solvent—as in HLLME‐FA—are eliminated.…”

Section: Introductionmentioning

confidence: 99%

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Flotation/ultrasound‐assisted microextraction followed by HPLC for determination of fat‐soluble vitamins in multivitamin pharmaceutical preparations

Shahdousti

Aghamohammadi

2018

J of Separation Science

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Dissolved carbon dioxide flotation-emulsification microextraction technique coupled with high-performance liquid chromatography was developed for separation and determination of fat-soluble vitamins (A, D , E, and K ) in multivitamin pharmaceutical preparations. Dissolved carbon dioxide flotation was used to break up the emulsion of extraction solvent in water and to collect the extraction solvent on the surface of aqueous sample in narrowed capillary part of extraction cell. Carbon dioxide bubbles were generated in situ through the addition of 300 μL of concentrated hydrochloric acid into the alkaline sample solution at pH = 11.5 (1% w/v sodium carbonate), which was sonicated to intensify the carbon dioxide bubble generation. Several factors affecting the extraction process were optimized. Under the optimal conditions, the limits of detection were 0.11, 0.47, 0.20 and 0.35 μg/L for A, E, D , and K vitamins in water samples, respectively. The inter-day and intra-day precision of the proposed method were evaluated in terms of the relative standard deviation and were <10.5%.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flotation/ultrasound‐assisted microextraction followed by HPLC for determination of fat‐soluble vitamins in multivitamin pharmaceutical preparations

Shahdousti

Aghamohammadi

2018

J of Separation Science

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“…Recently, a novel effervescence-assisted dispersive liquidliquid microextraction (EA-DLLME) method was proposed for the determination of different pesticides. [26][27][28][29][30] There were two patterns in the EA-DLLME procedures, for dispersion and for deemulsification. Bubbles were generated, making possible easy dispersion of the extraction solvent, and were used to break up the organic solvent in water emulsion so as to finish the extraction process.…”

Section: Introductionmentioning

confidence: 99%

Development of a Microextraction Method Based on Dissolved Carbon Dioxide Flotation after Emulsification for the Determination of Triazole Pesticides Residues in Water Samples by Gas Chromatography–Mass Spectrometry

et al. 2016

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A novel dissolved carbon dioxide flotation after emulsification microextraction (DCF-EME) method was proposed for the determination of four triazole pesticides in water samples coupled with gas chromatography-mass spectrometry (GC-MS) in a home-made glass round flask. The DCF-EME method is based on a rapid and simple phase separation of low-density organic solvent (toluene) from the aqueous phase via introducing a saturated NaHCO solution into the acidified sample (0.1 mol L HCl); then analytes were extracted in toluene. Various parameters affecting the extraction process were optimized. Under the optimal conditions, the recoveries for four pesticides ranged from 82.8 to 121.2%. Meanwhile the limits of detection were at the range of 0.14 - 1.04 μg L, and the preconcentration factors were varied between 342 and 473 for different triazoles. The method is simple, fast and environmentally friendly, being successfully applied for the determination of triazole pesticides in water samples.

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“…The process under the selected operation conditions could efficiently remove the suspended solid in wastewater from ABS resin gelatinous drying section (E section). According toMolaei et al (2015), dissolved CO2 flotation could be coupled with emulsification microextraction technique for preconcentrating six organochlorine pesticides in seawater Mahmoud et al (2015). applied flotation for Cd(II) removal from aqueous solutions.…”

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confidence: 99%

Physico‐Chemical Processes

Hua

Xiong

Zhu

et al. 2016

Water Environment Research

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Dissolved carbon dioxide flotation: An effective way for phase separation in emulsification microextraction method

Cited by 22 publications

References 33 publications

Flotation/ultrasound‐assisted microextraction followed by HPLC for determination of fat‐soluble vitamins in multivitamin pharmaceutical preparations

Flotation/ultrasound‐assisted microextraction followed by HPLC for determination of fat‐soluble vitamins in multivitamin pharmaceutical preparations

Development of a Microextraction Method Based on Dissolved Carbon Dioxide Flotation after Emulsification for the Determination of Triazole Pesticides Residues in Water Samples by Gas Chromatography–Mass Spectrometry

Physico‐Chemical Processes

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