A novel fatty-acid-based in-tube dispersive liquid–liquid microextraction technique for the rapid determination of nonylphenol and 4-tert-octylphenol in aqueous samples using high-performance liquid chromatography–ultraviolet detection

Shih, Hou-Kuang; Shu, Ting-Yun; Ponnusamy, Vinoth Kumar; Jen, Jen-Fon

doi:10.1016/j.aca.2014.11.021

Cited by 67 publications

(16 citation statements)

References 33 publications

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“…The solidification of nonanoic acid in an ice bath reduces experimental error caused by an inefficient collection of the extraction agent, but also avoids the need for specialized extraction devices, which simplifies operational steps and reduces experimental cost. The use of nonanoic acid, which solidifies upon chilling, further reduces complex matrix effects [34,35], resulting in improved accuracy and recovery.…”

Section: Comparison Of the Ea-sfam-sfo Methods With Othersmentioning

confidence: 99%

“…As a result, nonanoic acid was selected as extraction solvent for subsequent experiments. [34] reported that approximately 99.9% of the fatty acid was dissociated into its anion form and acted as an anionic surfactant when the pH was higher than its pK a by at least three pH units. In contrast, when the pH was at least three pH units below its pK a , more than 99.9% of the fatty acid was in its neutral hydrophobic form.…”

Section: Selection Of Fatty Acidsmentioning

confidence: 99%

“…They have been widely promoted as a new Bgreen^solvent in pretreatment applications in recent years [32,33]. Shih et al (2015) [34] reported a novel fatty acid-based, in-tube dispersive liquid-liquid microextraction (FA-IT-DLLME) technique for the determination of alkylphenols in aqueous samples, which achieved high extraction recovery, short extraction times, and low extraction solvent requirements. To determine ofloxacin in human urine, Vakh et al (2016) [35] used hexanoic acid as an extraction solvent and developed a fully automated effervescencea s s i s t e d s w i t c h a b l e s o l v e n t -b a s e d l i qu i d p h a s e microextraction (EA-SS-LPME) with enhanced extraction recoveries achieved through bubbling of CO 2 to increase interaction with analytes.…”

Section: Introductionmentioning

confidence: 99%

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An effervescence-assisted switchable fatty acid-based microextraction with solidification of floating organic droplet for determination of fluoroquinolones and tetracyclines in seawater, sediment, and seafood

et al. 2018

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This study developed a new effervescence-assisted switchable fatty acid-based microextraction combined with solidification of a floating organic-droplet (EA-SFAM-SFO) for simple and rapid determination of fluoroquinolones and tetracyclines in seawater, sediment, and seafood. Five medium-chain fatty acids (pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, and nonanoic acid) were tested as an extraction solvent, given their ability to change between hydrophobic and hydrophilic forms by pH adjustment. As nonanoic acid had the highest extraction recovery (>92%) for the six antibiotics and the ability to transform from liquid to a solidified floating state at low temperature, it was selected as the optimum extraction solvent. The prominent advantages of the newly developed method are: (1) reaction between the procedures salt and fatty acid changed extraction solvent from the hydrophobic to hydrophilic state; (2) bubbling with CO greatly increased the contact area between fatty acid and analytes resulting in improved extraction recovery; and (3) solidification of the fatty acid at a low temperature provided good separation and avoided the use of specialized equipment. Single-factor screening and optimization of the main factors were conducted using Plackett-Burman design and central composite design, respectively. The main parameters were optimized as follows: 258 μL fatty acid, 406 μL HSO (98%), 3.9 min vortex time, and 354 μL NaCO (2 mol L1). Under optimized conditions, limits of detection were 0.007-0.113 μg L or μg kg and extraction recoveries were 82.2%-116.7% for six fluoroquinolone and tetracycline antibiotics in seawater, sediments, and seafood. The newly developed method combines the advantages of effervescence-assisted dispersion, hydrophobic/hydrophilic switchable solvent, and liquid/solid transition induced by low temperature. Overall, the new method is simple, quick, and environment-friendly with low detection limits and high recoveries. Thus, the newly developed method has excellent prospects for sample pretreatment and analysis of antibiotics in marine environmental and food samples. Graphical Abstract ᅟ.

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Section: Comparison Of the Ea-sfam-sfo Methods With Othersmentioning

confidence: 99%

Section: Selection Of Fatty Acidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An effervescence-assisted switchable fatty acid-based microextraction with solidification of floating organic droplet for determination of fluoroquinolones and tetracyclines in seawater, sediment, and seafood

et al. 2018

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“…As an environmentally friendly solvent, medium-chain fatty acids have received increasing attention as a "green" solvent for sample pretreatment methods (Shih et al, 2015;Vakh et al, 2016). (Moghadam et al, 2017) used hexanoic acid to extract Ag (I) and Co (II) from cow milk, vitamin B12, orange juice, and tap water achieving high extraction efficiency, short extraction times and low organic solvent use.…”

Section: Introductionmentioning

confidence: 99%

Integrated disperser freezing purification with extraction using fatty acid-based solidification of floating organic-droplet (IDFP-EFA-SFO) for triclosan and methyltriclosan determination in seawater, sediment and seafood

Gao

Wang

Zhang

et al. 2018

Marine Pollution Bulletin

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TitleIntegrated disperser freezing purification with extraction using fatty acid-based solidification of floating organic-droplet (IDFP-EFA-SFO) for triclosan and methyltriclosan determination in seawater, sediment and seafood. Keywords:Triclosan Methyltriclosan Medium-chain fatty acid Disperser freezing purification Fatty acid-based solidification floating organicdroplet Marine environmental samples A B S T R A C TA microextraction method for the determination of triclosan and methyltriclosan in marine environmental samples was developed. The disperser was first serves as a preliminary extractant for analytes, then as a frozen solvent to remove impurities at −20°C, and finally as a disperser agent in the microextraction procedure. With the extractants solidified and float on the surface of the aqueous phase at low temperature, a separation was achieved to avoided use of specialized laboratory instruments. The method was optimized using Plackett-Burman design and central composite design as follows: 146 μL octanoic acid as extractant, 793 μL acetoneas disperser, 3.0 min centrifugation and 1.1 min vortex time. The limits of detection were 0.022-0.060 μg L −1 or μg kg −1 and recoveries were 83.3-103.5% for TCS and MTCS in seawater, sediments and seafood. The method has excellent prospects for sample pre-treatment and trace-level analysis of triclosan and methyltriclosan in marine environmental samples.

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“…Both procedures were further developed also by other authors [18e20]. Just a few months ago, Jen et al (2015) presented the application of medium-chain fatty acid as extraction solvent (hydrophobic form) for LPME [21]. This solvent can be switched between hydrophobic and hydrophilic forms by the adjustment of pH of the solution.…”

Section: Introductionmentioning

confidence: 99%

A fully automated effervescence-assisted switchable solvent-based liquid phase microextraction procedure: Liquid chromatographic determination of ofloxacin in human urine samples

Vakh

Pochivalov

Andruch

et al. 2016

Analytica Chimica Acta

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A novel fatty-acid-based in-tube dispersive liquid–liquid microextraction technique for the rapid determination of nonylphenol and 4-tert-octylphenol in aqueous samples using high-performance liquid chromatography–ultraviolet detection

Cited by 67 publications

References 33 publications

An effervescence-assisted switchable fatty acid-based microextraction with solidification of floating organic droplet for determination of fluoroquinolones and tetracyclines in seawater, sediment, and seafood

An effervescence-assisted switchable fatty acid-based microextraction with solidification of floating organic droplet for determination of fluoroquinolones and tetracyclines in seawater, sediment, and seafood

Integrated disperser freezing purification with extraction using fatty acid-based solidification of floating organic-droplet (IDFP-EFA-SFO) for triclosan and methyltriclosan determination in seawater, sediment and seafood

A fully automated effervescence-assisted switchable solvent-based liquid phase microextraction procedure: Liquid chromatographic determination of ofloxacin in human urine samples

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