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Simultaneous determination of seven metal ions in water samples by solid-phase extraction on polyacrylonitrile activated carbon fibres

机译:聚丙烯腈活性炭纤维固相萃取同时测定水中的7种金属离子

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摘要

A new solid-phase extraction method utilising polyacrylonitrile activated carbon fibres (PAN-ACFs) as adsorbent was developed for the preconcentration of trace metal ions prior to their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). The PAN-ACFs oxidised with nitric acid were characterised by FT-IR, XRD, SEM and BET analysis. Then the resulting PAN-ACFs were used as solid-phase adsorbent for simultaneously determination of trace Al(Ⅲ), Be(Ⅱ), Bi(Ⅲ), Cr(Ⅲ), Cu(Ⅱ), Fe(Ⅲ) and Pb(Ⅱ) ions in aqueous solutions. The influences of the analytical parameters on the recoveries of the studied ions were investigated. The optimum experimental conditions of the proposed method were pH: 6.0; eluent concentration and volume: 3.0 mL of 1.5 mol L~(-1) nitric acid; flow rates of sample and eluent solution: 1.5 mL min~(-1). The preconcentration factors were found to be 67 for Al(Ⅲ), Bi(Ⅲ); 83 for Cr(Ⅲ), Cu(Ⅱ), Fe(Ⅲ) and 50 for Be(Ⅱ), Pb(Ⅱ). The precision of this method was in range of 1.5%~3.5% and the detection limit of this metal ions was between 0.06~1.50 μg L~(-1). The developed method was validated by the analysis of a certified reference sample and successfully applied to the determination of trace metal ions in water samples with satisfactory results.
机译:开发了一种新的固相萃取方法,利用聚丙烯腈活性炭纤维(PAN-ACFs)作为吸附剂,用于痕量金属离子的预浓缩,然后通过电感耦合等离子体发射光谱法(ICP-OES)测定痕量金属离子。用FT-IR,XRD,SEM和BET分析对被硝酸氧化的PAN-ACFs进行表征。然后将所得的PAN-ACFs用作固相吸附剂,同时测定痕量的Al(Ⅲ),Be(Ⅱ),Bi(Ⅲ),Cr(Ⅲ),Cu(Ⅱ),Fe(Ⅲ)和Pb( Ⅱ)水溶液中的离子。研究了分析参数对所研究离子的回收率的影响。所提方法的最佳实验条件为pH:6.0。洗脱液的浓度和体积:3.0 mL的1.5 mol L〜(-1)硝酸;样品和洗脱液的流速:1.5 mL min〜(-1)。 Al(Ⅲ),Bi(Ⅲ)的预富集因子为67。 Cr(Ⅲ),Cu(Ⅱ),Fe(Ⅲ)为83,Be(Ⅱ),Pb(Ⅱ)为50。该方法的精密度在1.5%〜3.5%范围内,该金属离子的检出限在0.06〜1.50μgL〜(-1)之间。通过对认证参考样品的分析验证了该方法的成功性,并将其成功用于水样品中痕量金属离子的测定,结果令人满意。

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  • 作者单位

    School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, PR China,Research Center of Analysis and Test, East China University of Science and Technology, Shanghai 200237, PR China;

    School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, PR China;

    School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, PR China;

    School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, PR China;

    School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    inductively coupled plasma optical emission spectrometry; polyacrylonitrile activated carbon fibres; solid-phase extraction; trace metal ions;

    机译:电感耦合等离子体发射光谱法;聚丙烯腈活性炭纤维;固相萃取痕量金属离子;
  • 入库时间 2022-08-17 13:30:43

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