Determination of Dipyrone in Pharmaceutical Products by Flow Injection Analysis with Potentiometric Detection
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چکیده
منابع مشابه
Determination of dipyrone in pharmaceutical products by flow injection analysis with potentiometric detection.
This work describes an FIA potentiometric procedure for the quantification of dipyrone in pharmaceutical products. For the detector, a tubular electrode comprising a polymeric membrane containing tetraoctylammonium as an electroactive material (5% w/w), dibutylphtalate as a mediator solvent (65% w/w) and PVC (30% w/w) directly applied above a graphite conductor support was used. This unit was i...
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Neste trabalho, um eletrodo de polipirrol (PPy) foi utilizado como detector eletroquímico potenciométrico em um sistema de injeção em fluxo para a determinação de sulfametoxazol em formulações farmacêuticas. O eletrodo PPy foi preparado por voltametria cíclica em solução de acetonitrila. Uma relação linear foi observada no intervalo de concentração de 2,5 × 10 a 1,25 × 10 mol L com um coeficien...
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Two variant manifolds of a flow injection analysis (FIA) system are described for the determination of urea content in milks. This determination consists of the enzymatic reaction of urea with urease in which ammonium ion is formed. Ammonium is converted to ammonia by adding a NaOH solution and then led to a gas diffusion unit in which it diffuses to an acceptor channel (Tris/HCl, pH 7.5). Here...
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A simple and sensitive procedure for the determination of gentamicin is presented, based on the use of the peroxyoxalate chemiluminescent (PO-CL) system in presence of imidazole as a catalyst. The gentamicin has to be previously derivatized with o-phthaladehyde (OPA) in order to obtain a fluorophore, which participates in the PO reaction, producing a CL emission proportional to the gentamicin c...
متن کاملSequential determination of iron(II) and iron(III) in pharmaceutical by flow-injection analysis with spectrophotometric detection.
A flow injection procedure for the sequential spectrophotometric determination of iron(II) and iron(III) in pharmaceutical products is described. The method is based on the catalytic effect of iron(II) on the oxidation of iodide by bromate at pH = 4.0. The reaction was monitored spectrophotometrically by measuring the absorbance of produced triiodide ion at 352 nm. The activating effect for the...
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ژورنال
عنوان ژورنال: Analytical Sciences
سال: 2003
ISSN: 0910-6340,1348-2246
DOI: 10.2116/analsci.19.691