The separation and determination of nitrophenol isomers by high-performance capillary zone electrophoresis

Guo, Xifeng; Wang, Zhenhui; Zhou, Shuping

doi:10.1016/j.talanta.2004.01.020

Cited by 223 publications

(94 citation statements)

References 13 publications

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“…Conditions used in previous CZE studies [19,20] aimed at priority nitrophenol pollutants were not usable for the glass microchannel. Therefore, the effect of pH from 4.2 to 11.2 on migration time of tested substances was investigated (see Fig.…”

Section: Resultsmentioning

confidence: 99%

Separation and Detection of Nitrophenols at Capillary Electrophoresis Microchips with Amperometric Detection

2006

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A miniaturized analytical system for the separation and amperometric detection of toxic nitrophenols, based on the coupling of a micromachined capillary electrophoresis (CE) chip with a glassy carbon detector is described. This microsystem enables a rapid (120 s/sample) simultaneous determination of five priority nitrophenolic pollutants (2-nitrophenol, 3-nitrophenol, 4-nitrophenol, 2,4-dinitrophenol, and 2-methyl-4,6-dinitrophenol). These compounds can be detected down to the 1 Â 10 À5 M level using a 15 mM phosphate buffer pH 7.2 (containing 1.3 mM a-cyclodextrin) as running solution on 77 mm long microchannel by applying a separation voltage of 3000 V and a negative potential of À 0.7 V (vs. Ag /AgCl wire). Applicability to ground water samples was demonstrated.

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Section: Resultsmentioning

confidence: 99%

Separation and Detection of Nitrophenols at Capillary Electrophoresis Microchips with Amperometric Detection

2006

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“…Based on the above description, it is important to develop simple and reliable method for determination of trace amounts of 4-NP in environments 1,2 . Up to now, various techniques have been investigated to determine 4-NP, such as spectrophotometry, fluorescence, high-performance liquid chromatography 3 , liquid chromatography with electrochemical detection, capillary zone electrophoresis 4 , fiber optode 5 and electrochemical method 6 . Among them, electrochemical methods have received considerable attention because of the advantage of fast response, cheap instrument, low cost, simple operation, timesaving, high sensitivity and selectivity, real-time detection in in-situ condition.…”

Section: S88mentioning

confidence: 99%

Electrochemical Studies of Carbonated Hydroxyapatite/CHS Nanocomposite

2013

Chem Sci Trans

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Carbonated hydroxyapatite /CHS nanocomposites of varying composition for biomaterial applications have been synthesized. The Carbonated hydroxyapatite /CHS nanocomposite materials were characterized by XRD, FTIR, FESEM, EDAX, HRTEM and XPS. Carbonated hydroxyapatite (CHAp) nanorod embedded composite was prepared using chitosan (CHS) as a matrix with different weight percentages (wt %). The results indicated that the size and crystallinity of CHAp nano particles decreases with increase in CHS concentration in the composite. FESEM confirms the presence of CHAp nanorod crystals in CHS matrix. Cyclic voltammograms (CVs) were recorded to evaluate the electrocatalytic behaviors of the modified electrode towards the oxidation of 4-NP in the potential range of 0 to +1.0 V. A glassy carbon electrode was modified with carbonated hydroxyapatite nanopowder (CHAp-NP) and characterized in terms of electrochemical oxidation of 4-nitrophenol (4-NP) via cyclic voltammetry. The catalytic reaction facilitates electron transfer between 4-NP and the modified electrode, as a result the electrochemical oxidation of 4-NP becomes easier. The reason for this is that the CHAp-CHS 80 can act as a promoter to increase the rate of electron transfer, lower the overpotential of 4-NP at the bare electrode, and the anodic peak shifts less positive potential. Thus, it is clear that CHAp-CHS 80 modified GCE can be successfully used for the determination of organic pollutant.

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“…However, it is used to prevent the larvae of the pests from growing up. Dinoterbon, like all fungicide pesticides exhibits toxicity to humans, including carcinogenicity, reproductive, developmental toxicity, neurotoxicity and acute toxicity [4]. Graphene oxide a two-dimensional sheet of sp 2 -bonded carbon atoms arranged in a honeycomb lattice, has attracted increasing attention since it was first isolated from three-dimensional graphite by mechanical exfoliation [5].…”

Section: Introductionmentioning

confidence: 99%

Preparation of NiO-graphene oxide nanosensor for adsorptive stripping voltammetric determination of dinoterbon in food samples

Roja¹,

Prasad

Sandhya

et al. 2016

J. Electrochem. Sci. Eng.

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The separation and determination of nitrophenol isomers by high-performance capillary zone electrophoresis

Cited by 223 publications

References 13 publications

Separation and Detection of Nitrophenols at Capillary Electrophoresis Microchips with Amperometric Detection

Separation and Detection of Nitrophenols at Capillary Electrophoresis Microchips with Amperometric Detection

Electrochemical Studies of Carbonated Hydroxyapatite/CHS Nanocomposite

Preparation of NiO-graphene oxide nanosensor for adsorptive stripping voltammetric determination of dinoterbon in food samples

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