Copper ion imprinted organic-inorganic hybrid monolithic column as well as preparation method and application thereof

A copper ion, monolithic column technology, applied in the field of detection, can solve the problems of cumbersome and time-consuming preparation process, poor stability, limited selectivity, etc., and achieve strong mechanical and chemical stability, strong anti-interference ability, and good selectivity. Effect

Active Publication Date: 2021-06-11
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of limited selectivity, poor stability, tedious and time-consuming preparation process of the organic-inorganic hybrid monolithic column in the prior art, the present invention provides a copper ion imprinted organic-inorganic hybrid monolithic column and its preparation method and application

Method used

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  • Copper ion imprinted organic-inorganic hybrid monolithic column as well as preparation method and application thereof
  • Copper ion imprinted organic-inorganic hybrid monolithic column as well as preparation method and application thereof
  • Copper ion imprinted organic-inorganic hybrid monolithic column as well as preparation method and application thereof

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Effect test

preparation example Construction

[0041] The preparation of copper ion imprinted monolith mainly includes three steps: formation of Cu(II) complex, hydrolysis of silane reagent and polycondensation between silane monomers. Therefore, the type and amount of amino reagents are the most important factors in the preparation process. During the experiment, 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane (AAAPTES) was used as amino reagent, but AAAPTES and Cu 2+ The resulting hydrophilic Cu(II) complex has low solubility in a binary solvent system composed of ethanol and water, which makes it impossible to synthesize satisfactory imprinted materials. In addition, during the experiment, a variety of solvent systems have been tried, such as methanol, isopropanol, N,N-dimethylformamide and combinations of various solvents, but none of them can solve the above problems. Then, after a lot of research, it was surprisingly found that using AEAPTES as a functional monomer can well solve the solubility problem of...

Embodiment 1

[0050] In this example, actual samples such as rainwater, lake water, atmospheric particulate matter (PM3.3-10), and iron ore are taken as examples, and they are respectively digested into solutions, and a needle solid phase based on copper ion imprinted organic-inorganic hybrid monolithic column is used. Microextraction was used to determine the concentration of Cu(II) in it.

[0051] Such as Figure 4 As shown, the application of a copper ion imprinted organic-inorganic hybrid monolithic column in this embodiment in the separation and enrichment of copper ions, the specific steps are:

[0052] 1. Preparation of copper ion imprinted organic-inorganic hybrid monolithic column

[0053] (1) Capillary activation: sequentially use 1.5mol L at room temperature -1 Rinse the capillary with NaOH solution for 10 hours and ultrapure water for 30 minutes, 1.5mol L -1 Rinse with HCl solution for 10h, ultrapure water for 30min, and anhydrous methanol for 30min; 2 Dry the capillary unde...

Embodiment 2

[0070] This embodiment mainly investigates the influence of the SPME method on the analysis results of Cu(II) in three standard materials of GSD-2 (sediment), GSS-3 (soil), and ZBK309 (iron ore). Among them, GSD-2 (sediment), GSS-3 (soil), and ZBK309 (iron ore) are used as three standard substances.

[0071] Using the SPME method based on the copper ion imprinted organic-inorganic hybrid monolithic column obtained in Example 1 and directly using ICP-MS (without using the SPME method) for Cu(II) in the standard substance GSD-2, GSS-3 and ZBK309 The specific experimental results are shown in Table 2.

[0072] Table 2 The analysis results of Cu(II) in standard materials GSD-2, GSS-3 and ZBK309 with and without SPME method

[0073] (mean ± standard deviation, n = 3)

[0074]

[0075] It can be seen from Table 2 that compared with the direct use of ICP-MS, the concentration accuracy of Cu(II) measured by the SPME method based on copper ion imprinted organic-inorganic hybrid mo...

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Abstract

The invention discloses a copper ion imprinted organic-inorganic hybrid monolithic column as well as a preparation method and application thereof, and belongs to the technical field of detection. The copper ion imprinted hybrid monolithic column is prepared by combining an ion imprinting technology and a monolithic material, has a space structure and imprinting sites matched with target ions, can realize specific recognition and extraction of Cu (II), and shows accurate analysis of actual samples with complex matrixes. Particularly, the copper ion imprinted hybrid monolithic column has the potential of trace Cu (II) in a mineral sample with very high main metal content, and can be used for solid-phase microextraction analysis of trace metal elements in the environment and the mineral sample.

Description

technical field [0001] The invention belongs to the technical field of detection, and more specifically relates to a copper ion imprinted organic-inorganic hybrid monolithic column and its preparation method and application. Background technique [0002] Copper is an important metal element that plays an important role in the metabolism of living organisms. Copper is a component of about 30 enzymes and glycoproteins, and is an essential trace element for life activities. However, excessive copper intake can endanger human life. In recent years, with the continuous advancement of urban industrialization, electrolytic plating, ore mining and smelting, the use of chemical fertilizers in agricultural production, and the discharge of waste liquids in textile and chemical industries will all lead to copper pollution. Environmental copper also accumulates in humans through biomagnification. On the other hand, the analysis of some characteristic trace metal elements in mineral sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01D15/38B01D15/26
CPCB01J20/268B01D15/3852B01D15/265
Inventor 练鸿振费佳俊孙悦伦赵灵瑜陈逸珺
Owner NANJING UNIV
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