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Highly selective amino-functionalized magnetic molecularly imprinted polymers: absorbents for dispersive solid phase extraction and trace level analysis of chlorophenols in seawater

机译：高选择性氨基官能化磁性分子印迹聚合物：海水中氯酚的分散固相萃取和痕量分析的吸收剂

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摘要

A method of dispersive magnetic solid phase extraction (dMSPE) using magnetic molecularly imprinted polymer (nFe(3)O(4)@NH2MIP) as an adsorbent coupled with high performance liquid chromatography (HPLC) was developed for the determination of 5 kinds of chlorophenols (CPs) in seawater samples. 8 kinds of nFe(3)O(4)@NH2MIP were synthesized via suspension polymerization by using the 5 different kinds of CPs as templates and 4 different kinds of amines for surface grafting. Compared with seven other kinds of MIP materials and the non-imprinted magnetic polymers (nFe(3)O(4)@NH(2)NIPs), the as-prepared nFe(3)O(4)@TEPA-PCP-MIP showed excellent extraction performance for CPs with high enrichment efficiencies, short times, high recoveries and reusabilities. Various parameters affecting the extraction efficiency of the dMSPE of the 5 target CPs were optimized, including solution pH, extraction time, desorption time, desorption solution, volume of desorption solution, kinds of absorbents, etc. The results show that under the optimal condition, linearities are obtained ranging from 1 ng L-1 to 5000 ng L-1 with correlation coefficients (R) higher than 0.9989 for the target CPs. The recoveries are between 86.5% and 98.8% at the spiked levels with the relative standard deviations (RSDs) in the range of 0.8-8.8%. The limits of detection (LODs) are in the range of 0.18-1.2 ng L-1 and the limits of quantification (LOQs) are between 0.6 ng L-1 and 4.0 ng L-1. The developed method is successfully applied for real sample analyses, which confirm that it can be applied to routine monitoring for the determination of the CPs in seawater samples.
机译：使用磁性分子印迹聚合物（NFE（3）O（4）×NH2MIP）作为吸附剂与高效液相色谱（HPLC）的分散磁性相萃取（NFE（3）O（4））萃取（NFE（3）O（4））萃取（DMSPE）用于测定5种氯酚（HPLC） （CPS）在海水样本中。通过使用5种不同的CPS作为模板和4种不同种类的表面接枝，通过悬浮聚合合成8种NFE（3）O（4）o（4）o（4）o（4）o（4）o（4）o（4）o @ NH2MIP。与七种其他型材材料和非印记磁聚合物相比（NFE（3）O（4）@ NH（2）螺柱），用制备的NFE（3）O（4）o（4）@ TEPA-PCP-MIP为CPS提供了优异的富集效率，短时间，高回收率和再燃能力的优异提取性能。优化影响5个靶CPS DMSPE提取效率的各种参数，包括溶液pH，提取时间，解吸时间，解吸溶液，解吸溶液的体积，吸收剂种类等。结果表明，在最佳状态下，基线性从1ng L-1至5000ng L-1的范围内，对于目标CP，具有高于0.9989的相关系数（R）。在尖峰水平下，回收率在98.5％和98.8％之间，相对标准偏差（RSD）范围为0.8-8.8％。检测限（LOD）的限制在0.18-1.2ng L-1的范围内，并且量化限制（LOQ）在0.6ng L-1和4.0ng L-1之间。开发方法已成功应用于真实的样本分析，这证实可以应用于习惯监测，以确定海水样本中的CP。

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  • 来源
    《RSC Advances》 |2016年第84期|共11页
  • 作者

    Shen Haoyu; Liu Baiwei; Xiang Qi; Wang Chunchun; Mao Shi Qiang;

  • 作者单位

    Zhejiang Univ Ningbo Inst Technol Ningbo 315100 Zhejiang Peoples R China;

    Zhejiang Univ Ningbo Inst Technol Ningbo 315100 Zhejiang Peoples R China;

    Zhejiang Univ Ningbo Inst Technol Ningbo 315100 Zhejiang Peoples R China;

    Zhejiang Univ Ningbo Inst Technol Ningbo 315100 Zhejiang Peoples R China;

    Zhejiang Univ Ningbo Inst Technol Ningbo 315100 Zhejiang Peoples R China;

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  • 正文语种 eng
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