A combination of β-cyclodextrin functionalized magnetic graphene oxide nanoparticles with β-cyclodextrin-based sensor for highly sensitive and selective voltammetric determination of tetracycline and doxycycline in milk samples

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 41675-41686 ◽  
Author(s):  
Amr A. Yakout ◽  
Deia Abd El-Hady
Keyword(s):  
Solid Phase ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Phase Extraction ◽  
Carbon Paste ◽  
Magnetic Graphene Oxide ◽  
Selective Determination ◽  
Milk Samples ◽  
Highly Sensitive

Highly sensitive and selective determination of tetracycline and doxycycline in milk samples using solid phase extraction followed by differential pulse voltammetric determination on a β-cyclodextrin modified carbon paste sensor.

scholarly journals Selective determination of penicillin G from tap water and milk samples using surface molecularly imprinted polymers as solid-phase extraction sorbent

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Wei Du ◽  
Huiyan Zhou ◽  
Zhimin Luo ◽  
Penglei Zheng ◽  
Pengqi Guo ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Tap Water ◽  
High Rate ◽  
Penicillin G ◽  
Phase Extraction ◽  
Selective Determination ◽  
Milk Samples ◽  
Molecularly Imprinting Polymers

AbstractIn this study, a selective sample preparation method coupling surface molecularly imprinting polymers (SMIPs) with solid-phase extraction (SPE) was developed for the determination of penicillin G from tap water and milk samples. SMIPs for penicillin G were synthesized by using silica gel as supporting matrix, methacrylic acid (MAA) as the functional monomer, ethylene glycol dimethacrylate (EDMA) as the cross-linker, methanolacetonitrile (1:1,v/v) as the solvents and 2,2′-azo-bisisobutyronitrile (AIBN) as the initiator. Characterization and adsorption experiments revealed that SMIPs exhibited large adsorption capacity, high recognition ability and high rate of mass transfer. Application of SMIPs in SPE followed by HPLC was done to selectively determine penicillin G from tap water and milk samples. Under the optimal conditions, the proposed method demonstrated high linearity with the concentration of penicillin G ranging from 0.12 to 200 μg mL

Voltammetric determination of flutamide and its metabolite 4-nitro-3-trifluoromethylaniline at a hanging mercury drop minielectrode

2011 ◽  
Vol 76 (12) ◽  
pp. 1811-1823 ◽  
Author(s):  
Karolina Pecková ◽  
Markéta Průchová ◽  
Josino C. Moreira ◽  
Jiří Barek ◽  
Jan Fischer ◽  
...  
Keyword(s):  
Solid Phase ◽  
Pharmaceutical Formulations ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Phase Extraction ◽  
Optimum Conditions ◽  
Peak Potential ◽  
Main Metabolite ◽  
Limit Of Quantitation

Optimum conditions were found for direct current and differential pulse voltammetric determination of anticancer drug Flutamide and its main metabolite 4-nitro-3-trifluoromethylaniline on a hanging mercury drop minielectrode in mixed Britton–Robinson buffer (pH 12.0)–methanol (9:1) or 0.01MNaOH–methanol (9:1) media with limit of quantitation ca. 10–7mol l–1. It was proved that the newly developed method is applicable for the determination of Flutamide in pharmaceutical formulations and for the determination of both Flutamide and 4-nitro-3-trifluoromethylaniline in urine either directly with limit of quantitation ca. 10–5mol l–1or after solid phase extraction with limit of quantitation in the 10–7mol l–1concentration range. The sufficient peak potential difference of the two substances suggests the possibility of the analysis of their mixtures.

Differential Pulse Voltammetric Determination of Piroxicam on Lanthanide Ferric Oxide Nanoparticles-Carbon Paste Modified Electrode

2018 ◽  
Vol 14 (3) ◽  
pp. 271-276 ◽  
Author(s):  
Isaac Yves Lopes de Macedo ◽  
Morgana Fernandes Alecrim ◽  
Luane Ferreira Garcia ◽  
Aparecido Ribeiro de Souza ◽  
Wallans Torres Pio dos Santos ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Ferric Oxide ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Oxide Nanoparticles ◽  
Carbon Paste ◽  
Carbon Paste Modified Electrode

scholarly journals Dispersive solid-phase extraction based on butylamide silica for the determination of sulfamethoxazole in milk samples by capillary electrophoresis

2016 ◽  
Vol 39 (14) ◽  
pp. 658-665 ◽  
Author(s):  
Gabriela Islas ◽  
José A. Rodríguez ◽  
M. Elena Páez-Hernández ◽  
Silvia Corona-Avendaño ◽  
Alberto Rojas-Hernández ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction ◽  
Milk Samples
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