首页> 外文期刊>International journal of environmental analytical chemistry >Application of Ni(Ⅱ)-imprinted cross-linked poly(methacrylic acid) synthesised through double-imprinting method for the on-line preconcentration of Ni(Ⅱ) ions in aqueous media
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Application of Ni(Ⅱ)-imprinted cross-linked poly(methacrylic acid) synthesised through double-imprinting method for the on-line preconcentration of Ni(Ⅱ) ions in aqueous media

机译:双压印法合成Ni(Ⅱ)-印迹交联聚(甲基丙烯酸)在水中Ni(Ⅱ)离子在线预富集中的应用

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摘要

The present paper describes the feasibility of on-line preconcentration of nickel ions from aqueous medium on Ni(Ⅱ)-imprinted cross-linked poly(methacrylic acid) (IIP) synthesised through a double-imprinting method and their subsequent determination by FAAS. The proposed method consisted in loading the sample (20.0 mL, pH 7.25) through a mini-column packed with 50 mg of the IIP for 2 min. The elution step was performed with 1.0 mol L~(-1) HNO_3 at a flow rate of 7.0 mL min~(-1). The following parameters were obtained: quantification limit (QL) - 3.74 μg L~(-1), preconcentration factor (PF) - 36, consumption index (CI) -0.55 mL, concentration efficiency (CE) - 18 min~(-1), and sample throughput - 25 h~(-1). The precision of the procedure assessed in terms of repeatability for ten determinations was 5.6% and 2.5% for respective concentrations of 5.0 and 110.0 μg L~(-1). Moreover, the analytical curve was obtained in the range of 5.0-180.0 μg L~(-1) (r = 0.9973), and a 1.64-fold increase in the method sensitivity was observed when compared with the analytical curve constructed for the NIP (non-imprinted polymer), thus suggesting a synergistic effect of the Ni(Ⅱ) ions and CTAB on the adsorption properties of the IIP. The practical application of the adsorbent was evaluated from an analysis of tap, mineral, lake and river water. Considering the results of addition and recovery experiments (90.2-100 %), the efficiency of this adsorbent can be ensured for the interference-free preconcentration of the Ni(Ⅱ) ions.
机译:本文描述了通过双压印法在线预富集Ni(Ⅱ)-印迹交联聚(甲基丙烯酸)(IIP)上的水介质中镍离子的可行性,以及随后用FAAS测定的方法。拟议的方法包括将样品(20.0 mL,pH 7.25)通过装有50 mg IIP的微型柱上样2分钟。用1.0 mol L〜(-1)HNO_3以7.0 mL min〜(-1)的流速进行洗脱。获得以下参数:定量限(QL)-3.74μgL〜(-1),预浓缩因子(PF)-36,消耗指数(CI)-0.55 mL,浓缩效率(CE)-18 min〜(-1 )和样品通量-25 h〜(-1)。对于十个测定的可重复性评估的程序精度,分别为5.0和110.0μgL〜(-1)浓度为5.6%和2.5%。此外,在5.0-180.0μgL〜(-1)的范围内获得了分析曲线(r = 0.9973),与为NIP构建的分析曲线相比,方法灵敏度提高了1.64倍(非印迹聚合物),因此表明Ni(Ⅱ)离子和CTAB对IIP的吸附性能具有协同作用。通过对自来水,矿物质,湖泊和河水的分析来评估吸附剂的实际应用。考虑到添加和回收实验的结果(90.2-100%),可以确保该吸附剂对Ni(Ⅱ)离子的无干扰预富集效率。

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  • 作者单位

    Departamento de Quimica, Centro de Ciencias Exatas, Universidade Estadual de Londrina (UEL), Londrina, Brazil;

    Centro de Ciencias Agrarias, Universidade Estadual do Oeste do Parana (Unioeste), Marechal Candido Rondon, Brazil;

    Universidade Estadual do Oeste do Parana (Unioeste), Toledo, Brazil;

    Departamento de Quimica, Centro de Ciencias Exatas, Universidade Estadual de Londrina (UEL), Londrina, Brazil;

    Departamento de Quimica, Centro de Ciencias Exatas, Universidade Estadual de Londrina (UEL), Londrina, Brazil,Instituto de Quimica, Departamento de Quimica Analitica, Instituto Nacional de Ciencia e Tecnologia (INCT) de Bioanalitica, Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil;

  • 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

    double-imprinted polymer; FAAS; Ni(Ⅱ)-imprinted cross-linked poly(methacrylic acid); preconcentration;

    机译:双印聚合物FAAS;镍(Ⅱ)印迹交联聚(甲基丙烯酸);预浓缩;
  • 入库时间 2022-08-17 13:30:44

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