@article {JING2021116212,
	title = {Recent applications of graphene and graphene-based materials as sorbents in trace analysis},
	journal = {TrAC Trends in Analytical Chemistry},
	volume = {137},
	year = {2021},
	pages = {116212},
	abstract = {<p>Solid phase extraction for sample pretreatment offers many advantages, including short processing time, rapid separation, high enrichment efficiency and recovery rate, no emulsion formation, low cost, low solvent consumption as well as the ability to be coupled with different advanced detection techniques. However, the desirable characteristics of the solid phase extraction methods cannot be materialized unless a proper sorbent is used. The remarkable properties of graphene and graphene-based materials, particularly their ultra-large specific surface area and delocalized π-electron system, enhance their potential as efficient sorbents in solid phase extraction. This paper reviews the developments in the applications of graphene and novel graphene-based materials as sorbents in conventional solid-phase extraction, solid-phase microextraction, dispersive solid-phase extraction, pipette tip solid-phase extraction, and magnetic solid-phase extraction in the past 10 years. In addition, existing challenges and possible future developments in the applications of graphene and graphene-based materials as sorbents are discussed.</p>},
	keywords = {Graphene, graphene oxide, sample preconcentration, Solid phase extraction, trace analysis},
	issn = {0165-9936},
	doi = {https://doi.org/10.1016/j.trac.2021.116212},
	url = {https://www.sciencedirect.com/science/article/pii/S0165993621000340},
	author = {Wenqiang Jing and Jiaqin Wang and Bianca Kuipers and Wentao Bi and David D. Y. Chen}
}
@article {JING2020120378,
	title = {Sorbent and solvent co-enhanced direct analysis in real time-mass spectrometry for high-throughput determination of trace pollutants in water},
	journal = {Talanta},
	volume = {208},
	year = {2020},
	pages = {120378},
	abstract = {<p>A sorbent and solvent co-enhanced direct analysis in real-time mass spectrometry (SSE-DART-MS) method was developed for high-throughput determination of trace pollutants in water. The use of sorbent for preconcentration and solvents for assisting desorption and ionization synergistically enhanced the signals from the trace pollutants detected by DART-MS. Phthalic acid esters (PAEs) were used as model analytes to validate the SSE-DART-MS method. Graphitic carbon nitride (g\&ndash;C3N4)\&ndash;based materials with two morphologies and six organic solvents were used to systematically evaluate the enhancement effect by the sorbent and solvent. A better analytical performance was achieved with the two-dimensional (2D) g-C3N4, compared to three-dimensional (3D) g-C3N4/C, indicating that the morphologies of sorbents played a key role in SSE-DART-MS analysis. The MS signals of all the analytes were increased by 10\&ndash;100 times for the two materials in the presence of the selected solvents. With the SSE-DART-MS method, concentration limits of detection for water samples in the range 0.07\&ndash;0.94 ng L\&minus;1, and recovery in the range 82.8\&ndash;119\% using g-C3N4, were obtained for the PAEs. This work not only provides a reliable method for the coupling of solid phase extraction technique with DART-MS, but also presents valuable information for conducting other DART-MS analyses.</p>},
	keywords = {desorption, direct analysis in real time mass spectrometry, Graphitic carbon nitride, IONIZATION, Phthalic acid esters, Solid phase extraction},
	issn = {0039-9140},
	doi = {https://doi.org/10.1016/j.talanta.2019.120378},
	url = {http://www.sciencedirect.com/science/article/pii/S0039914019310112},
	author = {Wenqiang Jing and Yanying Zhou and Jiaqin Wang and Yuanfeng Zhu and Youqi Lv and Wentao Bi and Chen, David D. Y.}
}
