Technique of Simultaneous Spectrophotometric Determination of Chromium (Vi) and Iron (III) Via Curve Fitting

Ekaterina V. Larionova, Anna N. Vtorushina, Evgeniya V. Zabolotskaya, Ksenia A. Bulygina

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

Chromium and iron speciation has increasing applications with regard to different objects of environment and biomedical materials. Topical issue is the development of a technique of simultaneous determination of chromium and iron. In this work the possibility of simultaneous spectrophotometric determination of chromium (VI) and iron (III) with help of the mixed organic reagent (diphenylcarbazide and 1,10-phenanthroline) is studied. We have applied curve fitting method to separate overlapped absorption spectrum of chromium (VI) and iron (III). Peak shape analysis of pure signals of complexes of chromium (VI) with diphenylcarbazide and iron (III) with the 1,10- phenanthroline is previously carried out. For adequate application of curve fitting method we chose the optimal empirical models of signals taking into account preliminary information on their shape. Correctness of determination of concentration by means of the offered technique is proved by "added-found" method for a series of mixtures with different ratios of concentration of chromium (VI) and iron (III). It is founded that the error of determination of concentration doesn't exceed 11%.

Original languageEnglish
Pages15-18
Number of pages4
Publication statusPublished - 2015
EventISSAT International Conference on Modeling of Complex Systems and Environments, MCSE 2015 - Danang, Viet Nam
Duration: 8 Jun 201510 Jun 2015

Conference

ConferenceISSAT International Conference on Modeling of Complex Systems and Environments, MCSE 2015
CountryViet Nam
CityDanang
Period8.6.1510.6.15

Keywords

  • Chromium (VI)
  • Curve fitting
  • Iron (III)
  • Modeling
  • Peak shape analysis
  • Spectrophotometric analysis

ASJC Scopus subject areas

  • Computer Science(all)
  • Applied Mathematics
  • Modelling and Simulation
  • Statistics and Probability

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