A simple and efficient approach for preconcentration of some heavy metals in cosmetic products before their determinations by flame atomic absorption spectrometry

Authors : Nail ALTUNAY, Ramazan GÜRKAN

Pages : 988-1001

View : 20 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In the current study, a simple and efficient analytical method for preconcentration and determination of Cdinsert ignore into journalissuearticles values(II);, Pbinsert ignore into journalissuearticles values(II);, and Sninsert ignore into journalissuearticles values(II); in some cosmetic samples, using ultrasonic assisted-cloud point extraction and flame atomic absorption spectrometry, was developed. The method is based on the ternary complex formations of Sninsert ignore into journalissuearticles values(II);, Pbinsert ignore into journalissuearticles values(II);, and Cdinsert ignore into journalissuearticles values(II);, which are available in the form of neutral and/or anionic hydroxo complexes insert ignore into journalissuearticles values(Sninsert ignore into journalissuearticles values(OH);$_{3}^{-}$, Pbinsert ignore into journalissuearticles values(OH);$_{3}^{-}$, Cdinsert ignore into journalissuearticles values(OH);$_{2}$, and/or Cdinsert ignore into journalissuearticles values(OH);$_{3}^{-});$, with Victoria Pure Blue BO insert ignore into journalissuearticles values(VPB$^{+});$ in the presence of cetylpyridinium chloride at pH 8.5, and then extraction of the formed ternary complexes into the micellar phase of polyoxyethylene sorbitan monostearate insert ignore into journalissuearticles values(Tween 60);. Using the optimized conditions, a linear relationship was observed in the ranges of 12-330 $\mu $g L$^{-1}$ for Cdinsert ignore into journalissuearticles values(II);, 4-200 $\mu $g L$^{-1}$ for Pbinsert ignore into journalissuearticles values(II);, and 1-275 $\mu $g L$^{-1}$ for Sninsert ignore into journalissuearticles values(II);. The detection limits for Cdinsert ignore into journalissuearticles values(II);, Pbinsert ignore into journalissuearticles values(II);, and Sninsert ignore into journalissuearticles values(II);, respectively, were 3.70, 1.35, and 0.45 $\mu $g L$^{-1}$, with a preconcentration factor of 50, and the precision as relative standard deviations was lower than 4.2% for each analyte. The validity was verified by analysis of two certified reference materials. Finally, the method was successfully applied to the determination of these metals in various cosmetic samples.
Keywords : Extraction, green chemistry, heavy metals, pollution, spectroscopy, surfactants