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

Alina Diuzheva, Jana Šandrejová, and József Balogh

Pavol Jozef Šafárik University in Košice, Košice, Slovakia

 

E-mail: adyuzheva@gmail.com

Abstract: 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.

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

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-018-0570-z

 

Chemical Papers 73 (1) 165–172 (2019)

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