Open tubular capillary electrochromatography in fused-silica capillaries chemically bonded with macrocyclic dioxopolyamine

Guan, Na; Zeng, Zhaorui; Wang, Yuanchao; Fu, Enqin; Cheng, Jie

doi:10.1016/s0003-2670(00)00951-x

Cited by 65 publications

(28 citation statements)

References 19 publications

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“…Therefore, preparation of the column, and particularly the stationary phase packed or immobilized on the inner walls of the capillary, is critical for CEC. The capillary columns in CEC are usually classified into three main formats [10,11,17,[26][27][28][29][30][31][32][33]: (i) packed-CEC [12][13][14][15][16][34][35][36][37][38][39][40][41], (ii) open-tubular CEC (OT-CEC) [28][29][30][31][32][42][43][44][45][46][47][48][49][50][51][52][53], and (iii) monolithic (or continuous rod) CEC [9,27,.…”

Section: Introductionmentioning

confidence: 99%

Analytical separations in open‐tubular capillary electrochromatography

Kapnissi‐Christodoulou

Zhu

Warner

2003

Electrophoresis

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This review represents a summary of recent progress in open-tubular capillary electrochromatography (OT-CEC) for chiral and achiral separations. The OT-CEC approach is an alternative to packed-CEC that could eliminate the problems associated with retaining frits and silica particles. In OT-CEC, the stationary phase is immobilized on the inner walls of the capillary. Preparation of the stationary phase is critical for OT-CEC. The preparation methods for capillary columns include (i) adsorption, (ii) covalent bonding and/or cross-linking, (iii) porous layers, (iv) chemical bonding after etching, (v) sol-gel, and (vi) molecular imprinting. Major developments, potential applications, technical difficulties and advantages associated with these wall coatings in OT-CEC are presented. In addition, the coupling of OT-CEC with mass spectrometry (MS) is briefly reviewed. Several applications of this hyphenated technique for analytical separations are also summarized.

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Section: Introductionmentioning

confidence: 99%

Analytical separations in open‐tubular capillary electrochromatography

Kapnissi‐Christodoulou

Zhu

Warner

2003

Electrophoresis

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“…Therefore, a highly sensitive and selective analytical method is necessary for the simultaneous determination of the three dihydroxybenzene isomers. Up to now, various methods have been exploited for the determination of the dihydroxybenzenes, such as high performance liquid chromatography (HPLC) [3,4], spectrophotometry [5,6] Electrochemiluminescence [7], synchronous fluorescence [8], gas chromatography/mass spectrometry [9], capillary electrochromatography [10], pH-based-flow injection analysis [11], and electrochemical methods [12][13][14][15][16][17][18][19][20][21][22][23]. Among these methods, electrochemical method is of particular interest due to its high sensitivity, low cost, good selectivity, and rapid detection.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Hydroquinone, Catechol and Resorcinol at Graphene Doped Carbon Ionic Liquid Electrode

Zhao

2012

International Journal of Electrochemistry

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A new composite electrode has been prepared with doping graphene into the paste consisting graphite and ionic liquid, n-octyl-pyridinum hexafluorophosphate (OPFP). This electrode shows an excellent electrochemical activity for the redox of hydroquinone (HQ), catechol (CC), and resorcinol (RS). In comparison with bare paste electrode, the redox peaks of three isomers of dihydroxybenzene can be obviously, simultaneously observed at graphene doping paste electrode. Under the optimized condition, the simultaneous determination of HQ, CC, and RS in their ternary mixture can be carried out with a differential pulse voltammetric technique. The peak currents are linear to the concentration of HQ, CC, and RS in the range form 1 × 10 −5 to 4 × 10 −4 , 1 × 10 −5 to 3 × 10 −4 , and 1 × 10 −6 to 1.7 × 10 −4 mol L −1 , respectively. The limits of detection are 1.8 × 10 −6 mol L −1 for HQ, 7.4 × 10 −7 mol L −1 for CC, and 3.6 × 10 −7 M for RS, respectively.

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“…They are of great environmental concern owing to their high toxicity [4]. Various methods have been employed for the respective or simultaneous determination of them, such as spectrophotometry [5], HPLC [6], and capillary electrochromatography [7]. However, traditional spectrophotometry and colorimetric methods can be easily interfered by related compounds.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Dihydroxybenzene Isomers Using Preanodized Inlaying Ultrathin Carbon Paste Electrode

et al. 2010

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In this paper, we described a rapid, sensitive and selective method for simultaneous voltammetric determination of dihydroxybenzene isomers with a preanodized inlaying ultrathin carbon paste electrode (PAIUCPE). Scanning electron microscope (SEM), electrochemical impedance spectroscopy (EIS) and voltammetry were employed to characterize the configuration and electrochemical properties of the electrode. The resulting PAIUCPE exhibited excellent recognition ability towards dihydroxybenzene isomers. Three well-defined oxidation peaks of catechol (CC), resorcinol (RC) and hydroquinone (HQ) can be identified entirely at the electrode. The oxidation peak potential difference between HQ and CC was 120 mV, CC and RC 430 mV, respectively. The peak currents increased linearly with increasing the concentration of dihydroxybenzene isomers. The proposed electrode can be applied to simultaneous determination of dihydroxybenzene isomers without previous chemical or physical separations.

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Open tubular capillary electrochromatography in fused-silica capillaries chemically bonded with macrocyclic dioxopolyamine

Cited by 65 publications

References 19 publications

Analytical separations in open‐tubular capillary electrochromatography

Analytical separations in open‐tubular capillary electrochromatography

Simultaneous Determination of Hydroquinone, Catechol and Resorcinol at Graphene Doped Carbon Ionic Liquid Electrode

Simultaneous Determination of Dihydroxybenzene Isomers Using Preanodized Inlaying Ultrathin Carbon Paste Electrode

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