Chemical Papers

, Volume 73, Issue 1, pp 165–172 | Cite as

Study of complexation of aluminium with cinnamoyl derivative in the presence of fluoride ions using an optical probe: automated determination of fluoride

  • Alina DiuzhevaEmail author
  • Jana Šandrejová
  • József Balogh
Original Paper


In this work, the complexation of aluminium (III) with 3-[4-(dimethylamino)cinnamoyl]-4-hydroxy-6-methyl-3,4-2H-pyran-2-one (ligand) in the presence of fluoride using an optical probe for absorbance measurement was studied. It was adjusted that the complex was formed in the molar ratio (Al–Lig)3 to F 1:1. The reaction was applied to determine of fluoride. The optimum conditions were achieved at pH 8 with concentrations of Al3+ and ligand 6.75 and 0.195 mg L−1, respectively. Under optimized conditions, the calibration curve showed good linearity (r = –0.9976) in the range 0.23–1.9 mg L−1 of fluoride. The limit of detection of fluoride was found to be 0.02 mg L−1. The proposed method was applied for determination of fluoride concentration in mineral water samples and fully automated by sequential injection system.


Fluoride 3-[4-(dimethylamino)cinnamoyl]-4-hydroxy-6-methyl-3,4-2H-pyran-2-one Probes Sequential injection analysis 



A.D. would like to say a special thanks to the International Visegrad Fund for providing a 10-month scholarship.

Compliance with ethical standards

Conflict of interest

Authors have declared no conflict of interest.

Human and animal rights statement

This article does not contain any studies with human or animal subjects.


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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2018

Authors and Affiliations

  1. 1.Department of Analytical ChemistryPavol Jozef Šafárik University in KošiceKošiceSlovakia
  2. 2.Department of ChemistryUniversity of NyíregyházaNyíregyházaHungary
  3. 3.Department of Analytical ChemistryUzhgorod National UniversityUzhgorodUkraine

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