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  • 1 Departments of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), GavaZang 45137-66731, Zanjan, Iran
  • | 2 Department of Chemistry, Payame Noor University, 71365-944, Shiraz, Iran
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Abstract

Digital image-based calibration was applied for the determination of iron(III), Fe3+, as a catalyst in the oxidation of indigo carmine (IC) using bromate ion (BrO3). During the reaction, a colorless product was produced and there was an induction period (IP) before the color of the solution faded. The length of IP depended on the concentration of Fe3+. The color fading of reaction was recorded as a change of red, blue and green colors (%RBG). Kinetic profiles similar to what has been reported in a previous spectrophotometric study were obtained. Fe3+ was determined in the concentration range of 6–16 ppm at pH = 2 and 25 °C. The detection limit of Fe3+ was found to be 1.994 ppm, which is better in comparison with the previous work. Optimum concentrations of IC and BrO3 were obtained as 5.5 × 10−5 and 3 × 10−3 M, respectively, using a one-at-a-time optimization method. The optimum pH value was 2. The interference effect of various cations and anions on the determination of iron is reported. In addition, the application of the method to real samples of human serum was performed. The obtained results from real samples were in accordance with the obtained results using standard methods. The analysis of images (movies) recorded from an evolutionary chemical systems seems to open new, simple and low-cost analytical opportunities.

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Manuscript submission: www.editorialmanager.com/reac

  • Impact Factor (2019): 1.520
  • Scimago Journal Rank (2019): 0.345
  • SJR Hirsch-Index (2019): 39
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • SJR Quartile Score (2019): Q4 Catalysis
  • Impact Factor (2018): 1.142
  • Scimago Journal Rank (2018): 0.374
  • SJR Hirsch-Index (2018): 37
  • SJR Quartile Score (2018): Q3 Physical and Theoretical Chemistry
  • SJR Quartile Score (2018): Q3 Catalysis

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation
1974
Volumes
per Year
3
Issues
per Year
6
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)