Abstract
A rapid kinetic method for the simultaneous determination of levodopa, dopamine, and dobutamine was examined and developed. It was based on a consecutive reaction of a reduction of Cu(II) to Cu(I) by catecholamines, followed by the complexation of Cu(I) with neocuproine to form a yellow product in an acetic acid-acetate buffer. Spectrophotometric data were recorded at 453 nm (wavelength at the yellow complex absorption maximum) for 300 s. Linear calibrations were obtained in the concentration ranges of (0.08–1.44) × 10−5 mol L−1, (0.08–1.44) × 10−5 mol L−1, and (0.16–1.44) × 10−5 mol L−1 for levodopa, dopamine, and dobutamine, respectively. A variety of multivariate calibration models was developed for simultaneous analysis of the three analytes; while most models produced satisfactory prediction results for synthetic samples, the hybrid linear analysis method was arguably the best-performing (relative prediction error, RPET = 6.6 %). The proposed method was applied to an analysis of spiked rabbit serum samples and the results showed good agreement with the high performance liquid chromatography measurements.
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© 2011 Institute of Chemistry, Slovak Academy of Sciences
Articles in the same Issue
- Determination of four trace preservatives in street food by ionic liquid-based dispersive liquid-liquid micro-extraction
- Optimisation and validation of liquid chromatographic and partial least-squares-1 methods for simultaneous determination of enalapril maleate and nitrendipine in pharmaceutical preparations
- Chemiluminescence parameters of peroxynitrous acid in the presence of short-chain alcohols and Ru(bpy)32+
- Investigation of multi-layered silicate ceramics using laser ablation optical emission spectrometry, laser ablation inductively coupled plasma mass spectrometry, and electron microprobe analysis
- Simultaneous analysis of three catecholamines by a kinetic procedure: comparison of prediction performance of several different multivariate calibrations
- Enzymatic saccharification of cellulose in aqueous-ionic liquid 1-ethyl-3-methylimidazolium dimethylphosphate-DMSO media
- Statistical and evolutionary optimisation of operating conditions for enhanced production of fungal l-asparaginase
- Extraction of phytosterols from tall oil soap using selected organic solvents
- Dynamic simulations of waste water treatment plant operation
- Influence of recycling and temperature on the swelling ability of paper
- Zirconium(IV) 4-sulphophenylethyliminobismethylphosphonate as an efficient and reusable catalyst for one-pot synthesis of 3,4-dihydropyrimidones under solvent-free conditions
- Toxicity reduction of 2-(5-nitrofuryl)acrylic acid following Fenton reaction treatment
- Synthesis and characterisation of alkaline earth-iron(III) double hydroxides
- Effect of cyclodextrins on pH-induced conformational transition of poly(methacrylic acid)
- Polyamine-substituted epoxy-grafted silica for aqueous metal recovery
- Helical silica nanotubes: Nanofabrication architecture, transfer of helix and chirality to silica nanotubes
- DFT calculations on the Friedel-Crafts benzylation of 1,4-dimethoxybenzene using ZnCl2 impregnated montmorillonite K10 — inversion of relative selectivities and reactivities of aryl halides
- Facile synthesis of 3-aryl-1-((4-aryl-1,2,3-selenadiazol-5-yl)sulfanyl)isoquinolines
- Influence of trimethoxy-substituted positions on fluorescence of heteroaryl chalcone derivatives
- A simple and efficient one-pot synthesis of Hantzsch 1,4-dihydropyridines using silica sulphuric acid as a heterogeneous and reusable catalyst under solvent-free conditions
- Methylprednisolone release from agar-Carbomer-based hydrogel: a promising tool for local drug delivery
- 2-Alkylsulphanyl-4-pyridinecarbothioamides — inhibitors of oxygen evolution in freshwater alga Chlorella vulgaris
Articles in the same Issue
- Determination of four trace preservatives in street food by ionic liquid-based dispersive liquid-liquid micro-extraction
- Optimisation and validation of liquid chromatographic and partial least-squares-1 methods for simultaneous determination of enalapril maleate and nitrendipine in pharmaceutical preparations
- Chemiluminescence parameters of peroxynitrous acid in the presence of short-chain alcohols and Ru(bpy)32+
- Investigation of multi-layered silicate ceramics using laser ablation optical emission spectrometry, laser ablation inductively coupled plasma mass spectrometry, and electron microprobe analysis
- Simultaneous analysis of three catecholamines by a kinetic procedure: comparison of prediction performance of several different multivariate calibrations
- Enzymatic saccharification of cellulose in aqueous-ionic liquid 1-ethyl-3-methylimidazolium dimethylphosphate-DMSO media
- Statistical and evolutionary optimisation of operating conditions for enhanced production of fungal l-asparaginase
- Extraction of phytosterols from tall oil soap using selected organic solvents
- Dynamic simulations of waste water treatment plant operation
- Influence of recycling and temperature on the swelling ability of paper
- Zirconium(IV) 4-sulphophenylethyliminobismethylphosphonate as an efficient and reusable catalyst for one-pot synthesis of 3,4-dihydropyrimidones under solvent-free conditions
- Toxicity reduction of 2-(5-nitrofuryl)acrylic acid following Fenton reaction treatment
- Synthesis and characterisation of alkaline earth-iron(III) double hydroxides
- Effect of cyclodextrins on pH-induced conformational transition of poly(methacrylic acid)
- Polyamine-substituted epoxy-grafted silica for aqueous metal recovery
- Helical silica nanotubes: Nanofabrication architecture, transfer of helix and chirality to silica nanotubes
- DFT calculations on the Friedel-Crafts benzylation of 1,4-dimethoxybenzene using ZnCl2 impregnated montmorillonite K10 — inversion of relative selectivities and reactivities of aryl halides
- Facile synthesis of 3-aryl-1-((4-aryl-1,2,3-selenadiazol-5-yl)sulfanyl)isoquinolines
- Influence of trimethoxy-substituted positions on fluorescence of heteroaryl chalcone derivatives
- A simple and efficient one-pot synthesis of Hantzsch 1,4-dihydropyridines using silica sulphuric acid as a heterogeneous and reusable catalyst under solvent-free conditions
- Methylprednisolone release from agar-Carbomer-based hydrogel: a promising tool for local drug delivery
- 2-Alkylsulphanyl-4-pyridinecarbothioamides — inhibitors of oxygen evolution in freshwater alga Chlorella vulgaris