Determination of formaldehyde in shiitake mushroom by ionic liquid-based liquid-phase microextraction coupled with liquid chromatography

Liu, Jingfu; Peng, Jinfeng; Chi, Yonggang; Jiang, Guibin

doi:10.1016/j.talanta.2004.07.037

Cited by 158 publications

(65 citation statements)

References 10 publications

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“…In recent years, RTILs have attracted great attentions due to their unique chemical and physical properties such as nonvolatile (environmentally benign), excellent solvation qualities, non-flammable and high thermal stability [22,23]. As a result, RTILs are widely used in liquid-liquid extraction [24,25], synthesis [26,27], separation [28,29] and electrochemistry [30,31]. Some research groups have also studied the aggregation and micelles formation of ionic liquids in aqueous solution [32].…”

Section: Introductionmentioning

confidence: 99%

Analysis of phthalates via HPLC-UV in environmental water samples after concentration by solid-phase extraction using ionic liquid mixed hemimicelles

Cai

Shi

et al. 2008

Talanta

157

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Ionic liquid mixed hemimicelles-based solid-phase extraction for the preconcentration of five phthalates in environmental water sample was investigated in this paper. A comparative study on the use of room temperature ionic liquids (RTILs) 1-hexyl-3-methylimidazolium bromide ([C 6 mim]Br) and 1-dodecyl-3-methylimidazolium bromide ([C 12 mim]Br)-coated silica as sorbents was presented. Owing to having bigger adsorption amounts for analytes [C 12 mim], Br-coated silica was selected as SPE material and the five analytes di-ethyl-phthalate (DEP), di-n-propyl-phthalate (DnPP), di-n-butyl-phthalate (DnBP), di-cyclohexyl-phthalate (DcHP) and di-(2-ethylhexyl)-phthalate (DEHP) can be quantitatively extracted under optimal conditions. The analytes retained on the cartridge were desorbed completely with 3 mL methanol (pH 2). Predominant factors influencing the extraction efficiency, such as RTILs concentration, pH value, ionic strength and breakthrough volume were discussed. The proposed method had been applied to determining the five phthalates in four environmental water samples and concentration factor of 600 was achieved easily. Detection limits obtained ranged between 0.12 and 0.17 g/L. The accuracy of this method was evaluated by recovery measurement on spiked samples, and good recovery results (85-107%) with relative standard deviation (R.S.D.) of below 6% were achieved.

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Section: Introductionmentioning

confidence: 99%

Analysis of phthalates via HPLC-UV in environmental water samples after concentration by solid-phase extraction using ionic liquid mixed hemimicelles

Cai

Shi

et al. 2008

Talanta

157

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“…[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Among many possibilities of applying ionic liquids, IL-water (W) two-phase systems that consist of an aqueous or a nonpolar molecular solvent and an ionic liquid are of considerable relevance with analytical chemistry and separation technology. A direct application of IL-W two-phase systems is the extraction of neutral compounds of relatively low molecular weights, [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] biopolymers 44,[48][49][50][51] and ions. Several reviews on extraction with ILs are available.…”

Section: Introductionmentioning

confidence: 99%

Mutual Solubility of Hydrophobic Ionic Liquids and Water in Liquid-Liquid Two-phase Systems for Analytical Chemistry

Kakiuchi

2008

ANAL. SCI.

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Liquid-liquid two-phase systems formed by a hydrophobic ionic liquid and water find several useful ways of application in analytical chemistry. One of the most important properties of such two-phase systems is the mutual solubility of the IL and water. Recent advancements on this subject have been reviewed. The solubility of ionic liquids in water is related to the standard Gibbs energies of the transfer of ions constituting the ionic liquid from the ionic liquid phase to water. Although this single ionic property cannot be measured thermodynamically and also varies from one ionic liquid to another, the standard Gibbs energy of the ion transfer from a polar aprotic solvent, such as nitrobenzene and 1,2-dichloroethane, to water is a convenient measure for it. The solubility of an ionic liquid in water and the electrochemical properties at the interface between the two phases are intimately related with each other.

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“…An ILbased aqueous two-phase system ([C 4 MIM]Cl and K 2 HPO 4 buffer) was introduced as a simple, rapid and effective sample pretreatment technique for high-performance liquid chromatography (HPLC) analysis of the major opium alkaloids (codeine and papaverine) in Pericarpium papaveris [76]. Formaldehyde in shiitake mushroom was also determined by coupling IL-based LPME with HPLC [77]. The formaldehyde in the mushroom was leached into water, derivated by 2,4-dinitrophenylhydrazine (DNPH), and extracted into a 10 μl drop of [C 8 MIM][PF 6 ] by the LPME procedure.…”

Section: Preparation Of Biosamplesmentioning

confidence: 99%

Ionic liquids in sample preparation

et al. 2008

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Due to their unique properties, their good extractabilities for various target analytes, and the fact that many compounds are highly soluble in them, room-temperature ionic liquids (ILs) are used as promising alternatives to the traditional organic solvents employed in sample preparation. ILs have been used as extraction solvents for a wide range of analytes, from environmental contaminates to biomacromolecules and nanomaterials, and as dissolution solvents for various detection techniques. In this paper, the main applications of ILs in sample preparation are reviewed, and the problems and challenges in this area are described.

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Determination of formaldehyde in shiitake mushroom by ionic liquid-based liquid-phase microextraction coupled with liquid chromatography

Cited by 158 publications

References 10 publications

Analysis of phthalates via HPLC-UV in environmental water samples after concentration by solid-phase extraction using ionic liquid mixed hemimicelles

Analysis of phthalates via HPLC-UV in environmental water samples after concentration by solid-phase extraction using ionic liquid mixed hemimicelles

Mutual Solubility of Hydrophobic Ionic Liquids and Water in Liquid-Liquid Two-phase Systems for Analytical Chemistry

Ionic liquids in sample preparation

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