SPECTROPHOTOMETRIC DETERMINATION OF IRON

[Improved spectrophotometric determination of total iron and iron(III) with o-hydroxyhydroquinonephthalein and their characterization].

Simultaneous and fractional determination of iron(II) and iron(III) was accomplished with o-hydroxyhydroquinonephthalein (QP) in the presence of poly (N-vinyl pyrrolidone). In the determination of total iron (iron(II)+iron(III)), Beer's law was obeyed in the range of 0.02-0.67 μg·ml(-1), with an effective molar absorptivity (at 570 nm) and a relative standard deviation of 1.30×10(5)·l·mol(-1)·c...

Ethyl Maltol as a New Ligand for Spectrophotometric Determination of Iron

     In this study a new simple selective and sensitive spectrophotometric procedure for determination of Fe(III) is described. It is based on the formation of a colored complex between ferric iron and ethyl maltol, a strong and highly selective ligand for Fe(III). After mixing sample and reagent, and incubating at the room temperature, Fe(III)-ethyl maltol complex was extracted with different ...

Spectrophotometric Determination of Copper

The utility of Patton and Reeder’s indicator, HHSNNA, for the trace spectrophotometric and visual colorimetric determination of Cu 2+ is explored. A wine red complex of composition 1:1 is found to be formed between Cu 2+ and HHSNNA. The complex has λmax at 530 nm with ε = 25,558 L mole -1 cm -1 and is stable for more than 2 hrs. Beer’s law is obeyed between 0 to 1.5 ppm. The developed procedure...

Spectrophotometric determination of chlorodiazepoxide

Simple, rapid and sensitive spectrophotometric methods were developed for the determination of chlorodiazepoxide drugs in pharmaceutical dosage forms. This method is based on ion pair and charge transfer complexation reactions. The method is based on the reaction of the chlorodiazepoxide drug with Mo(V)–thiocyanate in hydrochloric acid medium followed by an extraction of the coloured ion-pair w...

Selective extraction spectrophotometric determination