An ionic-liquid-modified melamine-formaldehyde aerogel for in-tube solid-phase microextraction of estrogens followed by high performance liquid chromatography with diode array detection

Feng, Juanjuan; Wang, Xiuqin; Han, Shuhua; Ji, Xiangping; Li, Chunying; Luo, Chuannan; Sun, Min

doi:10.1007/s00604-019-3909-4

Cited by 50 publications

(5 citation statements)

References 34 publications

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“…As described in our previous research [43], the extraction tube was connected to six-port valve of HPLC to establish online system. Extraction and desorption were two stages of the online system, that can be quickly switched by rotating the six-port valve.…”

Section: Extraction Proceduresmentioning

confidence: 99%

Carbon nanotubes functionalized mesoporous silica for in‐tube solid‐phase microextraction of polycyclic aromatic hydrocarbons

Loussala

Feng

Han

et al. 2020

J of Separation Science

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A mesoporous silica was functionalized by carbon nanotubes to enhance the extraction performance. The mesoporous material was coated on stainless steel wires, and three wires were inserted inside of a polyetheretherketone tube for in‐tube solid‐phase microextraction. The tube was coupled to high‐performance liquid chromatography with diode array detection to obtain online analytical system, then its extraction performance was evaluated using eight polycyclic aromatic hydrocarbons as the targets. In order to good sensitivity and accuracy, four conditions were optimized such as sampling volume, sampling rate, methanol content in the sample, and desorption time. Under the optimum conditions, an online analytical method was established and exhibited low limits of detection from 0.005 to 0.050 µg/L, wide linear range of 0.016‐20.00 µg/L with acceptable correlation coefficients in 0.9921‐0.9999, as well as large enrichment factors in the range of 311‐2412. The method was successfully applied to determine trace polycyclic aromatic hydrocarbons in some real water samples including, two kinds of bottled water, tap water, and river water, a few polycyclic aromatic hydrocarbons were detected but none quantified in these samples.

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Section: Extraction Proceduresmentioning

confidence: 99%

Carbon nanotubes functionalized mesoporous silica for in‐tube solid‐phase microextraction of polycyclic aromatic hydrocarbons

Loussala

Feng

Han

et al. 2020

J of Separation Science

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“…In recent years, many new material-based extraction methods have been introduced to detect OPPs, e.g., dispersive liquid–liquid microextraction [ 5 ], hollow-fiber liquid-phase microextraction [ 6 ], dispersive micro-solid phase extraction [ 7 ], magnetic solid-phase extraction [ 1 ], ultrasound-assisted emulsification liquid-phase microextraction [ 8 ], fiber solid-phase microextraction [ 9 ], etc., which can shorten the extraction time and minimize the solvent consumption. Nowadays, the studied extraction materials mainly include metal organic frameworks [ 10 , 11 ], covalent organic frameworks [ 12 ], layered double hydroxides [ 13 ], molecularly imprinted polymers [ 14 ], graphitic carbon nitride [ 15 , 16 ], and ionic liquid [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

ZrO2 Nanoparticles and Poly(diallyldimethylammonium chloride)-Doped Graphene Oxide Aerogel-Coated Stainless-Steel Mesh for the Effective Adsorption of Organophosphorus Pesticides

Hou

Ding

Yan

et al. 2021

Foods

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A novel sorbent based on the ZrO2 nanoparticles and poly(diallyldimethylammonium chloride)-modified graphene oxide aerogel-grafted stainless steel mesh (ZrO2/PDDA-GOA-SSM) was used for the extraction and detection of organophosphorus pesticides (OPPs). Firstly, the PDDA and GO composite was grafted onto the surface of SSM and then freeze-dried to obtain the aerogel, which efficiently reduced the accumulation of graphene nanosheets. It integrated the advanced properties of GOA with a thin coating and the three-dimensional structural geometry of SSM. The modification of ZrO2 nanoparticles brought a selective adsorption for OPPs due to the combination of the phosphate group as a Lewis base and ZrO2 nanoparticles with the Lewis acid site. The ZrO2/PDDA-GOA-SSM was packed into the solid-phase extraction (SPE) cartridge to extract OPPs. According to the investigation of different factors, the extraction recovery was mainly affected by the hydrophilic-hydrophobic properties of analytes. Effective extraction and elution parameters such as sample volume, sample pH, rate of sample loading, eluent, and eluent volume, were also investigated and discussed. Under the optimal conditions, the linearity of phoxim and fenitrothion was in the range of 1.0–200 μg L−1, and the linearity of temephos was in the range of 2.5–200 μg L−1. The limits of detection were ranged from 0.2 to 1.0 μg L−1. This established method was successfully applied to detect OPPs in two vegetables. There was no OPP detected in real samples, and results showed that the matrix effects were in the range of 46.5%–90.1%. This indicates that the ZrO2/PDDA-GOA-SSM-SPE-HPLC method could effectively extract and detect OPPs in vegetables.

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“…Among these materials, aerogels as new nanomaterials have received extensive attention of researchers from different fields because of attractive merits, such as three‐dimensional (3D) network, high porosities (80–98%), low density (0.37–0.87 g/cm 3 ), controllable pore structures, large specific surface (1100 m 2 /g), and outstanding thermal and mechanical properties [22–24]. Our group also reported some works about aerogels, such as inorganic aerogel (silica aerogel) [25], organic aerogel (melamine‐formaldehyde aerogel) [26], as well as some modified aerogels [27–32], and satisfactory extraction results were achieved. Compared with traditional aerogels, carbon aerogels possess the characteristics of both aerogels and carbon materials, such as lightweight, stable and interconnected framework, low electrical resistivity, and delocalized π‐electron system [33].…”

Section: Introductionmentioning

confidence: 99%

Application of biocharcoal aerogel sorbent for solid‐phase microextraction of polycyclic aromatic hydrocarbons in water samples

Feng

et al. 2020

J of Separation Science

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A facile method was introduced for preparing a biocharcoal aerogel, which was derived from pomelo peel as the only raw material. The inner spongy layer of pomelo peel was freeze-dried for maintaining three-dimensional structure and then carbonized under high temperature and oxygen-limited conditions. The morphological structure and graphitization degree of biocharcoal aerogel were characterized using a scanning electron microscope and Raman spectrum. After sifting and grinding, the biocharcoal aerogel as an adsorbent was coated onto the surface of stainless steel wires. Through placing the wires into a polyetheretherketone tube, the in-tube solid-phase microextraction device was obtained. Coupled with high-performance liquid chromatography, it exhibited good extraction performance for polycyclic aromatic hydrocarbons, then an online analytical method was established with low limits of detection (0.005-0.050 ng/mL), wide linear ranges (0.017-15 ng/mL) with superior correlation coefficients higher than 0.9990, high enrichment factors (1128-3425), and acceptable intra-and inter-day repeatabilities (relative standard deviations ≤ 6.7%, n = 3). The method was applied to detect polycyclic aromatic hydrocarbons in bottled water samples, environmental water samples, and soft drinks with satisfactory recoveries (83.3-120.9%). This research not only developed a new carbon aerogel but also evaluated its adsorption performance in sample preparation.

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An ionic-liquid-modified melamine-formaldehyde aerogel for in-tube solid-phase microextraction of estrogens followed by high performance liquid chromatography with diode array detection

Cited by 50 publications

References 34 publications

Carbon nanotubes functionalized mesoporous silica for in‐tube solid‐phase microextraction of polycyclic aromatic hydrocarbons

Carbon nanotubes functionalized mesoporous silica for in‐tube solid‐phase microextraction of polycyclic aromatic hydrocarbons

ZrO2 Nanoparticles and Poly(diallyldimethylammonium chloride)-Doped Graphene Oxide Aerogel-Coated Stainless-Steel Mesh for the Effective Adsorption of Organophosphorus Pesticides

Application of biocharcoal aerogel sorbent for solid‐phase microextraction of polycyclic aromatic hydrocarbons in water samples

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