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Spectrophotometric determination of methyldopa in pharmaceutical formulations
(2005-07-01)
A new, simple, precise, rapid and low-cost spectrophotometric method for methyldopa determination in pharmaceutical preparations is described. This method is based on the complexation reaction of methyldopa with molybdate. ...
Determination and persistence of methiocarb in artichokes
(1996-12-01)
A simple and rapid method for the determination of methiocarb in artichokes by high-performance liquid chromatography with UV detection is described. No derivatization is needed and the limit of determination (0.01 ppm) ...
Caffeine Determination at a Carbon Fiber Ultramicroelectrodes by Fast-Scan Cyclic Voltammetry
(Soc Brasileira Quimica, 2012-04-01)
Caffeine determination using a fast-scan voltammetric procedure at a carbon fiber ultramicroelectrode (CF-UME) is described. The CF-UME was submitted to electrochemical pretreatment. Parameters such as number of acquisition ...
Spectrophotometric determination of methyldopa in pharmaceutical formulations
(2005-07-01)
A new, simple, precise, rapid and low-cost spectrophotometric method for methyldopa determination in pharmaceutical preparations is described. This method is based on the complexation reaction of methyldopa with molybdate. ...
Voltammetric determination of fenbendazole in veterinarian formulations
(Elsevier B.V., 2002-09-05)
A versatile voltammetric method for quantitative determination of fenbendazole (FBZ) in commercial tablets has been proposed, where direct dissolution of tablets is carried out in 0.1 mol l(-1) tetrabutylamoniun tetrafluorborate ...
Preconcentration of rutin at a poly glutamic acid modified electrode and its determination by square wave voltammetry
(Taylor & Francis Inc, 2007-01-01)
The voltammetric determination of rutin in 0.04 mol l(-1) B-R buffer (pH 4.0) by square wave voltammograms (+0.41 V vs. Ag/AgCl(sat.)) at a poly glutamic acid modified glassy carbon electrode was found to be several orders ...
Potentiometric determination of phosphorus in biodiesel using chemically modified electrode with cobalt film
(Elsevier B.V., 2014-01-01)
A cobalt film modified glassy carbon electrode was prepared by electrochemical deposition and its application was studied by potentiometry. The film modified electrode is used for the determination of phosphorus and exhibits ...
Determination of sulfate in ethanol fuel using an electrode chemically modified with polypyrrole by flow injection analysis
(2010)
In this work, an electrode chemically modified with polypyrrole (PCME) was employed for determination of sulfate in ethanol fuel using a FIA system. The PCME was prepared by polymerization of pyrrole at a glassy carbon ...
Determination and persistence of methiocarb in artichokes
(1996-12-01)
A simple and rapid method for the determination of methiocarb in artichokes by high-performance liquid chromatography with UV detection is described. No derivatization is needed and the limit of determination (0.01 ppm) ...
Spectrophotometric determination of dipyrone in pharmaceutical preparations by using chromotropic acid
(Elsevier B.V., 1999-09-30)
A spectrophotometric method for the determination of dipyrone in pharmaceutical preparations is proposed. This method is based on selective oxidation of dipyrone, in the presence of sulphuric acid, splitting off formaldehyde ...