Open AccessSpectrophotometric Determination of Zirconium by Dispersive Liquid-Liquid Microextraction based on Solidification of Floating Organic Droplets
Author(s) -
I.A. Ahmadov
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22863
Subject(s) - chemistry , nitrobenzene , zirconium , detection limit , extraction (chemistry) , dispersion (optics) , calibration curve , analytical chemistry (journal) , chromatography , inorganic chemistry , biochemistry , physics , optics , catalysis
In this study, a new method was developed for the spectrophotometric determination of zirconium bythe procedure of dispersive liquid-liquid microextraction based on the solidification of floating organicdroplets (DLLME-SFO). o-Nitrobenzene-azopyrocatechol (o-NBAP) and non-ionic surfactant (OP-10)were used in the complex formation. At the first stage, a separation and solidification processes werecarried out, after which the solidified samples were examined by spectrophotometric method. Theeffect of various parameters viz. pH effect, ion resistance, ligand effect, volume and type of extractionand dispersion solution, extraction time and temperature effect were studied. The results of the experimentwere optimized with design programs. The calibration curve was linear ranging from 0.5 to70 μg L-1,with a correlation coefficient of 0.998. The limit of detection (LOD) is 0.12 μg L-1, the limit ofquantification (LOQ) is 0.40 μg L-1 and the relative standard deviation (RSD) at 60 μg L-1 is 1.6%(n=6). This method was also applied to determine zirconium in various water samples. The obtainedreextraction amount was 98-110%.