The Determination of Amino Acids by Oxidation with Cerium (IV)

Spectrophotometric determination of olanzapine by its oxidation with N-bromosuccinimide and cerium(IV)sulfate.

Three simple spectrophotometric methods have been described for the assay of olanzapine in its pure and pharmaceutical formulations. The direct method (A) is based on the drug oxidation with excess of N-bromosuccinimide in acidic medium and the two indirect methods (B and C) are based on the oxidation of the drug with excess of N-bromosuccinimide and cerium(IV)sulfate, followed by the reaction ...

Simple fluorimetric method for determination of certain antiviral drugs via their oxidation with cerium (IV).

A simple and sensitive fluorimetric method for determination of antiviral drugs: ribavirin, acyclovir, and amantadine hydrochloride has been developed. The method was based on the oxidation of these drugs by cerium(IV) in presence of perchloric acid and subsequent monitoring the fluorescence of the induced cerium(III) at lambdaexcitation 255 and lambdaemission 355 nm. Different variables affect...

Flow injection chemiluminescence determination of amino acids by oxidation with N-bromosuccinimide.

Kinetic Spectrofluorometric Determination of Certain Calcium Channel Blockers via Oxidation with Cerium (IV) in Pharmaceutical Preparations

A simple and sensitive kinetic spectrofluorometric method was developed for the determination of some calcium channel blockers namely, verapamil hydrochloride, diltiazem hydrochloride, nicardipine hydrochloride and flunarizine. The method is based upon oxidation of the studied drugs with cerium (IV) ammonium sulphate in acidic medium. The fluorescence of the produced Ce (III) was measured at 36...

Spectrophotometric and Fluorimetric Methods for Determination of Naltrexone in Urine, Serum and Tablets by Oxidation with Cerium (iv)

This paper proposes new methods for simple and sensitive spectrophotometric and fluorimetric determination of naltrexone (NALT) in tablet and biological fluids. The spectrophotometric method involve addition of a known excess of Ce(IV) to NALT in acid medium, followed by determination of residual Ce(IV) by reacting with a fixed amount of methyl orange, and measuring the absorbance at 510 nm. Fl...