A New Ultrasound Assisted-Cloud Point Extraction Method for the Determination of Trace Levels of Tin and Antimony in Food and Beverages by Flame Atomic Absorption Spectrometry
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  • 作者:Nail Altunay ; Ramazan Gürkan ; Emre Yıldırım
  • 关键词:Antimony ; Tin ; UA ; CPE ; FAAS ; Food/Beverages ; Food safety
  • 刊名:Food Analytical Methods
  • 出版年:2016
  • 出版时间:October 2016
  • 年:2016
  • 卷:9
  • 期:10
  • 页码:2960-2971
  • 全文大小:661 KB
  • 刊物类别:Chemistry and Materials Science
  • 刊物主题:Chemistry
    Food Science
    Chemistry
    Microbiology
    Analytical Chemistry
  • 出版者:Springer New York
  • ISSN:1936-976X
  • 卷排序:9
文摘
In the current study, a new ultrasonic-assisted cloud-point extraction (UA-CPE) method for the preconcentration and determination of antimony and tin in the selected food and beverages was developed by flame atomic absorption spectrometry (FAAS). The method is based on the fact that formation of the stable ternary complexes of Sb(III) and Sn(IV) with 2-(2,4-dihydroxyphenyl)-3,5,7-trihydroxychromen-4-one (morin) in presence of cetyltrimethylammoniumbromide (CTAB) as both sensitivity improvement auxiliary ligand and counter ion, and then extraction into the micellar phase of poly(ethylene glycol-mono-p-nonylphenylether (PONPE 7.5) as extracting agent at pH 8.5. Under the optimized conditions, the calibration curves for Sb(III) and Sn(IV) were rectilinear with changing calibration sensitivities in ranges of 0.1–140 and 0.1–225 μg L−1, respectively. The limit of detection for both Sb(III) and Sn(IV) was 0.03 μg L−1 with sensitivity enhancement factor of 114.5 and 110.6, respectively. The precision as a relative standard deviation (RSD) for Sb(III) and Sn(IV) is in range of 2.3–5.2 and 2.6–5.4 %, respectively. The trueness of the method was verified by analysis of certified reference materials (CRMs). The method was successfully applied to determination of antimony and tin in the selected food and beverage matrices.

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