Spectrophotometric determination of some theophylline derivatives
, 1988 A spectrophotometric method for the determination of 8-chlorotheophylline, diprophylline and oxyethyltheophylline, is presented. Spectrophotometric determinations were carried out in CH3OH, 0.5 mol dm-3 H2SO4 4.65 mol dm-3 KOH, respectively.
Nikolić, Kosta, Medenica, Mirjana
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Indirect spectrophotometric method for determination of captopril using Cr(VI) and diphenylcarbazide
Química Nova, 2012 A spectrophotometric method for the indirect determination of captopril (CP) in pharmaceutical formulations is proposed. The proposed procedure is based on the oxidation of captopril by potassium dichromate and the determination excess oxidant on the ...
Zenovia Moldovan +3 more
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Molecules, 2009 Coenzyme A (CoA or CoASH) is one of the most important biologically active compounds, and for this reason a reliable, fast and simple determination of CoASH is needed.
Josipa Giljanović, Ante Prkić
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Spectrophotometric and derivative spectrophotometric determination of aluminium with Hydroxynaphthol Blue [PDF]
Talanta, 1994 The reaction of aluminium(III) with Hydroxynaphtol Blue (HNB) in aqueous media at apparent pH 5.5 results in a red complex that is stable for at least 4 hr. Beer's Law is obeyed up to 1.6 microg/ml of aluminium(III) with an apparent molar absorptivity of 1.66 x 10(4) l.mol(-1). cm(-1) at 569 nm.
S L, Ferreira +4 more
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Detection of nitrite by flow injection analysis using a novel paired emitter-detector diode (PEDD) as a photometric detector [PDF]
, 2007 An inexpensive flow injection analysis system for determining low concentration levels of nitrite employing the Griess reagent spectrophotometric method is reported.
O'Toole, Martina +8 more
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Direct spectrophotometric measurement of supra-physiological levels of ascorbate in plasma
Redox Biology, 2016 Background: Supra-physiological concentrations of ascorbate, vitamin C, in blood, greater than 1 mM, achieved through intravenous administration (IV), are being tested in clinical trials to treat human disease, e.g. cancer.
Jordan R. Witmer +5 more
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مجلة بغداد للعلوم, 2014 The new organic reagent 2-[Benzo thiazolyl azo]-4,5-diphenyl imidazole was prepared and used as complexing agent for separation and spectrophotometric determination of Cu2+ ion in some samples include plants, soil, water and human blood serum.
Baghdad Science Journal
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Spectrophotometric determination of leukocytes in blood [PDF]
Journal of Clinical Laboratory Analysis, 2002 AbstractThe determination of leukocyte concentration in human blood depending on the detection of oxidized o‐dianisidine in acidic solution is studied. The oxidation of o‐dianisidine was carried out by peroxidase enzymes found in leukocytes. The reaction was stopped by the addition of 4N H2SO4 to the solution, and a very stable, colored o‐dianisidine ...
Huriye, Kuzu-Karsilayan +4 more
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Spectrophotometric determination of flurazepam in pharmaceutical formulations
, 1996 Two spectrophotometric methods are proposed for the determination of flurazepam in pharmaceutical formulations. The first one, a very sensitive and fast direct spectrophotometric method is based on the measurement of the absorbance of aqueous flurazepam ...
Popović, Gordana, Pfendt, Lidija
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Analytical application of the reaction system phenyl fluorone-hydrogen peroxide for the kinetic determination of cobalt and tin traces by spectrophotometry in ammonia buffer media [PDF]
Hemijska Industrija, 2013 The present paper describes two new, simple, rapid, selective and sensitive kinetic spectrophotometric methods for Co(II) and Sn(II) determination in solution at room temperature, based on their effect on phenyl fluorone (PF) oxidation by ...
Rančić Sofija M. +2 more
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