Preparation and characterization of tentacle-type polymer stationary phase modified with graphene oxide for open-tubular capillary electrochromatography

Gao, Xing; Mo, Rongzhen; Ji, Yibing

doi:10.1016/j.chroma.2015.04.039

Cited by 28 publications

(15 citation statements)

References 32 publications

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“…A comparison of GO/G based stationary phases for CEC was made to demonstrate the advantage of the proposed columns. For most of open‐tubular and monolithic columns , column fabrication consisted of several steps, i.e ., capillary preconditioning, surface modification and/or polymerization, which was time‐consuming and cumbersome. GO/G modification undergoing in‐situ in capillaries is also difficult to control reaction conditions, and loading amount of GO/G is limited by their solubility.…”

Section: Resultsmentioning

confidence: 99%

“…Apart from sample pretreatment, GO also exhibits potentials as a stationary phase in chromatographic separation. On one hand, GO was chemically bonded or electrostatically attracted on the inner surface of capillary columns for gas chromatography , capillary electrochromatography and capillary electrophoresis use. On the other hand, GO was physically embedded or chemically decorated in monolithic columns for CEC use .…”

Section: Introductionmentioning

confidence: 99%

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Electrochromatographic performance of graphene and graphene oxide modified silica particles packed capillary columns

et al. 2018

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Graphene oxide functionalized silica microspheres (GO@SiO ) were synthesized based on condensation reaction between amino from aminosilica particles and carboxyl groups from GO. Reduction of GO@SiO with hydrazinium hydroxide generated graphene modified silica particles (G@SiO ). GO@SiO and G@SiO packed capillary columns for capillary electrochromatography were thereafter fabricated by pressure slurry packing with single-particle frits. GO of 0.3 mg/mL in dispersion solution for GO@SiO synthesis was considered as a compromise between retaining and column efficiency whereas GO@SiO of 20 mg/mL in slurries for column packing was chosen for a homogenous and tight bed. Optimum mobile phases were acquired considering both electroosmotic flow and resolution at an applied voltage of -6 kV as the following: acetonitrile/phosphate buffer (10 mM, pH 7.0), 75:25 (v/v) for polycyclic aromatic hydrocarbons and 50:50 (v/v) for aromatic compounds. A comparison was made between electrochromatographic performances for three PAHs (naphthalene, fluorene and phenanthrene) and three aromatic compounds of various polarities (toluene, aniline and phenol) on bare aminosilica, GO@SiO and G@SiO packed columns, which proved the contribution of alone or combinational actions of solvophobic effect and π-π electron stacking as well as hydrogen bonds to retaining behaviors by GO@SiO and G@SiO . Well over-run, over-day and over-column precisions (retention time: 0.3-1.4, 1.1-3.8 and 2.8-5.2%, respectively; peak area: 2.6-6.5, 4.8-8.3 and 6.5-12.6%, respectively) of GO@SiO packed columns were a powerful proof for good reproducibility. Analytical characteristics of GO@SiO packed capillary columns in CEC analysis of fresh water were evaluated with respect to linearity (R = 0.9961-0.9989) over the range 0.1 to 100 mg/L and detection limits of 9.5 for naphthalene, 12.6 for fluorene and 16.2 μg/L for phenanthrene. Further application to fresh water increased the visibility of the proposed material, where good spike recoveries in the range 89-96% were offered.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochromatographic performance of graphene and graphene oxide modified silica particles packed capillary columns

et al. 2018

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“…SEM provided evidences that the tentacle type polymer and GO were coated uniformly to the capillary inner wall (Fig. ) and responsible for the outstanding separation performance . Qu et al.…”

Section: Carbon‐based Npsmentioning

confidence: 99%

Recent advances in nanomaterial‐based capillary electrophoresis

et al. 2019

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This review gives a summary of applications of different nanomateials, such as gold nanoparticles (AuNPs), carbon‐based nanoparticles, magnetic nanoparticles (MNPs), and nano‐sized metal organic frameworks (MOFs), in electrophoretic separations. This review also emphasizes the recent works in which nanoparticles (NPs) are used as pseudostationary phase (PSP) or immobilized on the capillary surface for enhancement of separation in CE, CEC, and microchips electrophoresis.

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“…For example, Gao et al. developed a novel hybrid organic polymer‐GO nanomaterial for OT column by covalent attaching method. The column generated a strong and stable electroosmotic flow from anode to cathode with the running electrolytes of pH ranging from 4.0 to 9.0, and showed excellent separation ability toward neutral small molecules, amino acids and ephedrine‐pseudoephedrine isomers with resolution higher than 2.30 and column efficiency up to over 170 000 plates/m.…”

Section: Column Techniquementioning

confidence: 99%

Recent advances in microscale separation

et al. 2017

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Recent advances in microscale separationThis review focuses on the recent advances on microscale separation technology, particularly on the new development on column and detection technologies in electrophoretic and chromatographic separation modes (i.e., CE, CEC, cLC, etc.). Representative examples illustrate also applications on the small molecules, peptides, proteins, polysaccharides, chiral and so on. 246 relevant articles are cited covering the literature published

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Preparation and characterization of tentacle-type polymer stationary phase modified with graphene oxide for open-tubular capillary electrochromatography

Cited by 28 publications

References 32 publications

Electrochromatographic performance of graphene and graphene oxide modified silica particles packed capillary columns

Electrochromatographic performance of graphene and graphene oxide modified silica particles packed capillary columns

Recent advances in nanomaterial‐based capillary electrophoresis

Recent advances in microscale separation

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