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Solidified floating organic drop microextraction–electrothermal atomic absorption spectrometry for ultra trace determination of antimony species in tea, basil and water samples

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Abstract

Solidified floating organic drop microextraction was applied as a separation/preconcentration step prior to the electrothermal atomic absorption spectrometric (ETAAS) determination of ultra trace of antimony species. The method was based on the formation of an extractable complex between Sb(III) and ammonium pyrrolidinedithiocarbamate at pH ~ 5, while Sb(V) was remained in the aqueous phase. The antimony extracted into 1-undecanol was determined by ETAAS. Total antimony was determined after the reduction of Sb(V) to Sb(III) with potassium iodide and ascorbic acid. The amount of Sb(V) was determined from the difference of concentration of total antimony and Sb(III). Under the optimum conditions an enhancement factor of 437.5 and a detection limit of 5.0 ng L−1for the preconcentration of 25 mL of sample was achieved. The relative standard deviation at 300 ng L−1 of antimony was found to be 3.5 % (n = 6). The proposed method was successfully applied to the determination of antimony in tea, basil and natural water samples.

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Authors and Affiliations

  1. Department of Chemistry, Yazd University, 89195-741, Yazd, Safaieh, Iran

    Shayessteh Dadfarnia, Ali Mohammad Haji Shabani & Maryam Nili Ahmad abadi

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  1. Shayessteh Dadfarnia
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  2. Ali Mohammad Haji Shabani
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  3. Maryam Nili Ahmad abadi
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Correspondence to Shayessteh Dadfarnia.

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Dadfarnia, S., Haji Shabani, A.M. & Nili Ahmad abadi, M. Solidified floating organic drop microextraction–electrothermal atomic absorption spectrometry for ultra trace determination of antimony species in tea, basil and water samples. J IRAN CHEM SOC 10, 289–296 (2013). https://doi.org/10.1007/s13738-012-0157-5

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  • DOI: https://doi.org/10.1007/s13738-012-0157-5

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