Pressurized liquid extraction and dispersive liquid–liquid microextraction for determination of tocopherols and tocotrienols in plant foods by liquid chromatography with fluorescence and atmospheric pressure chemical ionization-mass spectrometry detection

Viñas, Pilar; Bravo-Bravo, María; López-Garcı́a, Ignacio; Pastor-Belda, Marta; Hernández‐Córdoba, Manuel

doi:10.1016/j.talanta.2013.10.053

Cited by 61 publications

(31 citation statements)

References 43 publications

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“…The working curves were constructed by plotting the corresponding peak areas measured versus the concentrations of Sudan dyes in a series of spiked samples (Viñas et al 2014b). The corresponding linear regression equations and correlation coefficients are listed in Table 3.…”

Section: Linearitymentioning

confidence: 99%

Determination of Sudan Dyes in Juice Samples via Solidification of Ionic Liquid in Microwave-Assisted Liquid-Liquid Microextraction Followed by High-Performance Liquid Chromatography

Song

et al. 2016

Food Anal. Methods

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Solidification of ionic liquid (SIL) has been applied in microwave-assisted liquid-liquid microextraction method for analyzing Sudan dyes in juice samples. 1-Ethy-3-methylimidazolium hexafluorophosphate ([C 2 MIM][PF 6 ]) was selected as the extraction solvent due to its relatively high melting point. With the aid of microwave irradiation, the dyes could be easily extracted into ionic liquid phase without dispersive solvent. The solid microdroplet could be easily separated from liquid. Compared with traditional dispersive liquidliquid microextraction, this method will greatly simplify the collection procedure and shorten the operation time. Several experimental parameters, including the amount of ionic liquid, microwave power and irradiation time, pH of sample solution, and ionic strength, were systematically investigated and optimized. The limits of detection for Sudan I, II, III, and IV were 1.08, 1.30, 1.14, and 1.19 μg/L, respectively. The recoveries of the analytes ranged from 83.42 to 115.56 % and relative standard deviations were lower than 11.53 %, when the present method was applied to the analysis of real samples.

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Section: Linearitymentioning

confidence: 99%

Determination of Sudan Dyes in Juice Samples via Solidification of Ionic Liquid in Microwave-Assisted Liquid-Liquid Microextraction Followed by High-Performance Liquid Chromatography

Song

et al. 2016

Food Anal. Methods

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“…To replace the highly toxic halogenated hydrocarbons used in previously reported DLLME methods for analysis of tocopherols, [14][15][16] 6 ] to which 6 mL water was added to perform IL-DLLME. To replace the highly toxic halogenated hydrocarbons used in previously reported DLLME methods for analysis of tocopherols, [14][15][16] 6 ] to which 6 mL water was added to perform IL-DLLME.…”

Section: Optimization Of the Dllmementioning

confidence: 99%

“…This technique has recently been applied for the determination of tocopherols and tocotrienols in plant foods, 14 cereal grains 15 and a-tocopherol in wheat in our previous studies. This technique has recently been applied for the determination of tocopherols and tocotrienols in plant foods, 14 cereal grains 15 and a-tocopherol in wheat in our previous studies.…”

Section: Introductionmentioning

confidence: 99%

Determination of α-tocopherol in cereal grains by use of saponification coupled with ionic-liquid-based dispersive liquid–liquid microextraction before high-performance liquid chromatography-mass spectrometry

et al. 2016

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A selective and low organic-solvent-consuming method of sample preparation combined with highperformance liquid chromatography-mass spectrometry detection is introduced for the analysis of atocopherol in cereal grains. The sample treatment involves initial saponification and preconcentration of the analyte performed by ionic-liquid-based dispersive liquid-liquid microextraction, with ethanol as disperser solvent and 1-octyl-3-methylimidazolium hexafluorophosphate as extraction solvent. The method offered excellent linearity over a range of 0.5-15 mg g À1 with a correlation coefficient of r > 0.998. Intra-day and inter-day repeatability, expressed as relative standard deviation were 3.4% and 5.9%, respectively. The quantitation limits and detection limits were 2.5 and 0.7 ng g À1 . Satisfactory recoveries ranging from 86.5% to 106.3% were obtained. The developed method was successfully applied to 12 cereal grain samples.

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“…So far, literature reports concerning simultaneous analysis of T and T3 with the use of LC/MS are scarce. Likewise, works describing the ion source optimization in the case of simultaneous determination of multiple tocochromanols are limited.…”

Section: Introductionmentioning

confidence: 99%

Ionization of tocopherols and tocotrienols in atmospheric pressure chemical ionization

Bartosińska

Moor

Siluk

et al. 2018

Rapid Comm Mass Spectrometry

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Pressurized liquid extraction and dispersive liquid–liquid microextraction for determination of tocopherols and tocotrienols in plant foods by liquid chromatography with fluorescence and atmospheric pressure chemical ionization-mass spectrometry detection

Cited by 61 publications

References 43 publications

Determination of Sudan Dyes in Juice Samples via Solidification of Ionic Liquid in Microwave-Assisted Liquid-Liquid Microextraction Followed by High-Performance Liquid Chromatography

Determination of Sudan Dyes in Juice Samples via Solidification of Ionic Liquid in Microwave-Assisted Liquid-Liquid Microextraction Followed by High-Performance Liquid Chromatography

Determination of α-tocopherol in cereal grains by use of saponification coupled with ionic-liquid-based dispersive liquid–liquid microextraction before high-performance liquid chromatography-mass spectrometry

Ionization of tocopherols and tocotrienols in atmospheric pressure chemical ionization

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