Advertisement

Fresenius' Journal of Analytical Chemistry

, Volume 369, Issue 6, pp 530–534 | Cite as

A new spectrophotometric method for the determination of total and ferric iron in rain water at the ppb level

  • K. S. Patel
  • A. Shukla
  • A. Goswami
  • S. K. Chandavanshi
  • P. Hoffmann
Original paper

Abstract

A new, simple, selective and sensitive spectrophotometric procedure for the on-site quantification of iron at nano-gram levels in atmospheric precipitations, i.e. rain as sample source is described. It is based on the color reaction of Fe3+ with SCN ions in the presence of a cationic surfactant, i.e. cetylpyridinium chloride (CPC), in strong HCl solution, and subsequent extraction of the complex with N-octylacetamide into toluene or chloroform. The apparent molar absorptivity of the complex is 2.60 × 105 L mol–1 cm–1 at λmax = 480 nm at an enrichment factor (EF) of 10. The detection limit (causing higher absorbance than the sum of the blank absorbance (0.009) and 3 SD) is 5 ng mL–1 Fe. Ions commonly associated with iron did not interfere in the present method. The effect of analytical variables, i.e. amount and type of the reagents, acidity, solvent, temperature, dilution, etc., in the determination of iron are discussed. The validity of the present method is checked with GF-AAS. The method has been applied to the determination of iron at the ppb level in rain water samples.

Keywords

Surfactant Present Method Enrichment Factor Ferric Iron Cationic Surfactant 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • K. S. Patel
    • 1
  • A. Shukla
    • 1
  • A. Goswami
    • 1
  • S. K. Chandavanshi
    • 1
  • P. Hoffmann
    • 2
  1. 1.School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492010, MP, IndiaIN
  2. 2.Materials and Geo Science, Chemical Analytics, Technical University Darmstadt, Petersenstr.23, 64287 Darmstadt, Germany e-mail: dg7j@hrzpub.tu-darmstadt.deDE

Personalised recommendations