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Multiwalled carbon nanotubes modified with 2-aminobenzothiazole modified for uniquely selective solid-phase extraction and determination of Pb(II) ion in water samples

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Abstract

A solid phase extraction method is presented for the selective preconcentration and/or separation of trace Pb(II) on multiwalled carbon nanotubes modified with 2-aminobenzothiazole. Inductively coupled plasma optical emission spectrometry was used for detection. The effects of pH, shaking time, sample flow rate and volume, elution condition and interfering ions were examined using batch and column procedures. An enrichment factor of 100 was accomplished. Common other ions do not interfere in both the separation and determination. The maximum adsorption capacity of the sorbent at optimum conditions is 60.3 mg g−1 of Pb(II), the detection limit (3σ) is 0.27 ng mL−1, and the relative standard deviation is 1.6% (n = 8). The method was validated using a certified reference material, and has been applied to the determination of trace Pb(II) in water samples with satisfactory results.

2-Aminobenzothiazole modified multiwalled carbon nanotubes has been developed to separate and concentrate trace Pb(II) from aqueous samples. Parameters that affect the sorption and elution efficiency were studied in batch and column modes, and the new sorbent (MWCNTs-ABTZ) presents high selectivity and adsorption capacity for the solid phase extraction of trace Pb(II).

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Authors and Affiliations

  1. Department of Chemistry, Lanzhou University, Lanzhou, 730000, People’s Republic of China

    Ruijun Li, Xijun Chang, Zhenhua Li, Zhipeng Zang, Zheng Hu, Dandan Li & Zhifeng Tu

  2. Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, People’s Republic of China

    Ruijun Li, Xijun Chang, Zhenhua Li, Zhipeng Zang, Zheng Hu, Dandan Li & Zhifeng Tu

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  1. Ruijun Li
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Correspondence to Xijun Chang.

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Li, R., Chang, X., Li, Z. et al. Multiwalled carbon nanotubes modified with 2-aminobenzothiazole modified for uniquely selective solid-phase extraction and determination of Pb(II) ion in water samples. Microchim Acta 172, 269–276 (2011). https://doi.org/10.1007/s00604-010-0488-9

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