Extraction of phthalate esters from water and beverages using a graphene-based magnetic nanocomposite prior to their determination by HPLC

Wu, Qiuhua; Liu, Min; Ma, Xiaoxing; Wang, Weina; Wang, Chun; Zang, Xiaohuan

doi:10.1007/s00604-011-0752-7

Cited by 102 publications

(34 citation statements)

References 43 publications

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“…39 The QuEChERS approach yielded significantly higher LODs at between 0.8 and 15 µg kg -1 using liquid chromatography and mass spectrometry; 40 while a magnetic graphene nanocomposite based SPE achieved LODs between 0.01 and 0.04 ng mL -1 . 41 The best comparison is that with the air-assisted liquid-liquid microextraction which achieved the LODs of 0.12 to 1.15 ng mL -1 . 42 From the aforegoing comparisons, it is evident that this technique yielded comparative results to those reported in literature; as such it presents a very affordable and viable alternative to the pool of miniaturized extraction techniques for these compounds.…”

Section: Research Articlementioning

confidence: 99%

Extraction and Pre-concentration of Phthalic Acid Esters from Aqueous Solutions using Agitation-assisted Dispersed Binary Solvents Microextraction

2017

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As the search for efficient, affordable and environmentally friendly extraction methods continues, miniaturized solvent techniques are receiving considerable attention due to their simplicity, efficiency and fast extraction rates. Herein we report application of a modified dispersive liquid-liquid microextraction through the introduction of a second extracting solvent in place of a disperser solvent leading to a much improved organic solvent recovery after the extraction of phthalic acid esters from aqueous solutions. The method employs a 75 µL binary mixture of ethylacetate and tetrachloromethane with a 3:1 ratio, extraction time of 20 seconds, and 10 % NaCl. The method demonstrates sufficient linearity (R 2 ³ 0.9866) and repeatability (%RSD £ 12.5, for n = 15) with the estimated LOD in the range (0.01-0.05 ng mL -1 ) using the S/N approach. The method demonstrated significant enrichment factors averaging about 2100 with headspace and about 3000 and increase of over 40 % without headspace, indicating the importance of reduced headspace volume in this approach, especially if the ionic strength is increased. However, the method yielded a significantly wide range of recoveries (65-115 %) when applied to the analysis of spiked soil samples when coupled to hot-water extraction. However, this may not be entirely attributable to the extraction approach but rather heat-induced hydrolysis during the hot-water dissolution, prior to the proposed organic extraction method. KEYWORDSDispersive liquid-liquid microextraction, binary solvents, phthalic acid esters, headspace volume, extracting solvent recovery.

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Section: Research Articlementioning

confidence: 99%

Extraction and Pre-concentration of Phthalic Acid Esters from Aqueous Solutions using Agitation-assisted Dispersed Binary Solvents Microextraction

2017

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“…Table 3 summarizes G/GO as SPSs used in SPE, SPME, MSPD and SBSE [25,[151][152][153][154][155][156][157][158][159][160][161][162][163][164][165][166][167].…”

Section: Graphene Graphene Oxide and Other Carbon Nanomaterialsunclassified

Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis

Wen

Chen

et al. 2014

TrAC Trends in Analytical Chemistry

342

123

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A B S T R A C TSample preparation is a crucial bottleneck in the whole analytical process. Solid-phase sorbents (SPSs) have aroused increasing interest in research on sample preparation, as they have key roles in obtaining high clean-up and enrichment efficiency in the analysis of trace targets present in complex matrices. The objective of this review is to provide a broad overview of the recent advances and applications of SPSs in sample preparation prior to chromatographic analysis, during the period 2008-13. We include SPSs, such as molecularly-imprinted polymers, carbon nanomaterials, metallic nanoparticles and metal organic frameworks, focusing on solid-phase extraction, solid-phase microextraction, matrix solid-phase dispersion and stir-bar sorptive extraction of typical pollutants in environmental, biological, food and pharmaceutical samples. We propose remaining challenges and future perspectives to improve development of new SPSs and to apply them further.

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“…For this reason, the sample preparation procedure is an important step in an analytical study. Up to now, various pretreatment techniques have been carried out to extract PEs from different samples, 4 such as ionic liquid cold-induced aggregation dispersive liquidliquid microextraction (IL-CIA-DLLME), 5 dispersive liquid-liquid microextraction (DLLME), 6 graphenebased magnetic nanocomposite, 7 and magnetic carbon nanotubes (CNTs). 8 Recently, an air-assisted liquid-liquid microextraction method (AALLME) as a new version of DLLME was developed for extraction and preconcentration of some compounds in aqueous samples.…”

Section: Introductionmentioning

confidence: 99%

In Tube Ultrasonic and Air Assisted Liquid-Liquid Microextraction-Gas Chromatography-Mass Spectrometry Determination: a Novel Method for the Determination of Phthalate Esters in Aqueous Samples

Farahani

Ramezani

Hassan

et al. 2016

J. Braz. Chem. Soc.

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In this study, a highly sensitive and reliable microextraction method, known as in tube ultrasonic and air assisted liquid-liquid microextraction (IT-UAA-LLME), was developed for the preconcentration of some phthalate esters, such as dimethyl phthalate, diethyl phthalate (DEP), di-butyl-phthalate (DBP), bis(2-ethylhexyl) phthalate (BEHP), butyl benzyl phthalate (BBP), and di n-octyl-phthalate (DNOP), prior to their determination using gas chromatography-mass spectrometry (GC-MS). In this technique, the extraction solvent was dispersed into the aqueous sample solution using an ultrasonic bath. The effects of solvent type, aeration time and salt concentration were investigated. After extraction, an organic solvent was injected into the GC-MS instrument for quantification. Under optimum conditions, the enrichment factors ranged from 100 to 330. The calibration curves showed good linearity (r 2 > 0.99) and limit of detections were obtained in the range of 0.1-2.1 ng mL -1 in the working concentration ranges. The method was successfully applied for determination of six phthalate esters in real samples with complex matrices with relative standard deviation less than 8%, recovery 88-112% and thus, satisfactory results were obtained.

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Extraction of phthalate esters from water and beverages using a graphene-based magnetic nanocomposite prior to their determination by HPLC

Cited by 102 publications

References 43 publications

Extraction and Pre-concentration of Phthalic Acid Esters from Aqueous Solutions using Agitation-assisted Dispersed Binary Solvents Microextraction

Extraction and Pre-concentration of Phthalic Acid Esters from Aqueous Solutions using Agitation-assisted Dispersed Binary Solvents Microextraction

Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis

In Tube Ultrasonic and Air Assisted Liquid-Liquid Microextraction-Gas Chromatography-Mass Spectrometry Determination: a Novel Method for the Determination of Phthalate Esters in Aqueous Samples

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