Graphite “Filter Furnace-Atomizer with Pd–Mg Chemical Modifier for Direct Analysis of Foods Using Electrothermal Atomic Absorption Spectrometry

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• 作者：A. Zacharia ; A. Zhuravlev ; A. Chebotarev ; M. Arabadji
• 关键词：Electrothermal atomic absorption spectrometry ; Graphite “filter furnace? atomizer ; Chemical modifier ; Pb ; As ; Cd ; Food analysis
• 刊名：Food Analytical Methods
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：8
• 期：3
• 页码：668-677
• 全文大小：2,219 KB
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  3. Becker E, Rampazzo RT, Dessuy MB, Vale MGR, Silva MM, Welz B, Katskov DA (2011) Direct determination of arsenic in petroleum derivatives by graphite furnace atomic absorption spectrometry: a comparison between filter and platform atomizers. Spectrochim Acta Part B 66:345-51. doi:10.1016/j.sab.2011.04.003 CrossRef
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• 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

文摘

This paper presents the results of optimization of operation parameters, investigation of analytical characteristics, and the capabilities of a graphite “filter furnace? (FF) atomizer with a Pd–Mg chemical modifier (CM) for the direct determination of trace amounts of Pb, As, and Cd in foods by electrothermal atomic absorption spectrometry (ET AAS). The effects of heating parameters of the furnace on atomic absorbance values of Pb, As, and Cd were investigated during the pyrolysis and atomization steps including the carrying out of the investigation in the presence of mineral and organic macrocomponents of the analyzed materials. It is shown that the use of the graphite FF atomizer and Pd–Mg CM provides a ~2-fold increase in sensitivity of ET AAS determination of the listed elements in comparison with a conventional heated graphite furnace with a platform as well as completely or significantly eliminate matrix effects including background absorbance. The obtained limits of quantification for Pb, As, and Cd in foods were 0.0015, 0.002, and 0.0001?mg?kg?, respectively. The reliability of the proposed method was checked using standard methods.