Device and method for determining nanometer material through hollow fiber field-flow fractionation

A technology of flow field flow separation and nanomaterials, which is applied in the field of environmental analytical chemistry to achieve the effects of high separation efficiency, low operating cost and easy operation

Inactive Publication Date: 2015-01-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the separation and determination of nano-gold and nano-silver by the hollow fiber flow field flow classification system

Method used

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  • Device and method for determining nanometer material through hollow fiber field-flow fractionation
  • Device and method for determining nanometer material through hollow fiber field-flow fractionation
  • Device and method for determining nanometer material through hollow fiber field-flow fractionation

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Effect test

Embodiment 1

[0044] Embodiment 1: Polystyrene (polystyrene, be called for short PS) microsphere separation assay

[0045] Polystyrene (PS) microspheres are widely used in nanoscale standard particles because of their high monodispersity, ideal spherical shape, easy-to-control particle size and surface electrical properties. The company has commercialized PS microspheres for sale. The microspheres of the present invention are purchased from the National Institute of Standards and Technology (abbreviated as NIST) of two kinds of PS microspheres with particle diameters of about 50nm and 100nm. During the experiment, the maximum absorption wavelength of the ultraviolet detector was selected as 254nm. The hollow fiber flow field flow separation device is used to separate the mixture of two PS microspheres, and the resolution R is 1.8. It can be seen that the device of the present invention can be used for the separation of PS microspheres with different particle sizes.

Embodiment 2

[0046] Embodiment 2: Separation and determination of synthetic gold nanoparticles

[0047] In the early days, gold nanoparticles were used as drugs, such as to treat alcoholism, tuberculosis, arthritis and so on. Since the 20th century, with the maturity of the synthesis method of nano-gold particles and the in-depth research on the characteristics of nano-gold optics, electricity and biological affinity, the application fields of nano-gold have become more extensive. The hollow fiber flow field flow separation device was used to separate two kinds of self-prepared gold nanoparticles. During the experiment, the maximum absorption wavelength of the ultraviolet detector was selected as 520nm. With the device of the present invention, gold nanoparticles with two sizes of 5nm and 60nm are better separated (R=2.5).

Embodiment 3

[0048] Embodiment 3: Separation and determination of nano-silver in sewage treatment plant outlet wastewater

[0049] In addition to applications in the electronics industry and catalysis, nano-silver is widely used in medicine and personal care because of its good bactericidal properties. Nanosilver will inevitably be released into the environment during production and use. The device of the invention is used to separate and measure the nano-silver in the outlet wastewater of a sewage treatment plant. During the experiment, the maximum absorption wavelength of the ultraviolet detector was selected as 410nm. The recoveries of the standard sample were 85% (20nm), 92% (40nm) and 102% (60nm), and the resolution R of the three particle sizes of nano silver was greater than 1.7. The device of the invention will have wide application prospects in the fields of environmental chemistry, environmental detection research and the like.

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Abstract

The invention relates to a device for determining a nanometer material through hollow fiber field-flow fractionation. The device comprises a separation channel which is a hollow fiber membrane of regenerated cellulose, polysulfone, polyether sulfone or polyacrylonitrile, wherein the molecular weight cut-off of the hollow fiber membrane is 30kDa; an injection pump is connected with the separation channel and used for providing a radial external field; a manual microsyringe feeds the sample into a flow path so that the sample enters the separation channel; the separation channel is connected with an ultraviolet detector for online detection to the nanometer material; and a moving phase is transported into the separation channel for elution through two plunger pumps respectively. The device has the advantages of low operating cost, simplicity in operation, good reproducibility and the like, and can be applied to separation and determination of other metal nano materials, metallic oxide nano materials, quantum dots, fullerene and other typical artificial nanometer materials.

Description

technical field [0001] The invention belongs to the field of environmental analysis chemistry, and in particular relates to a device for separating and measuring nanomaterials in a hollow fiber flow field. [0002] The present invention also relates to a method for separating and measuring nanomaterials using the above-mentioned device. Background technique [0003] With the in-depth study of nanomaterials, the environmental effects and biological safety of nanomaterials have attracted widespread attention (A Nel, T Xia, L Madler, et al, Science, 2006, 311, 622-627). In recent years, reports on the toxic effects of nanomaterials themselves and the synergistic toxic effects with coexisting pollutants have grown exponentially (E Navarro, F Piccapietra, B Wagner, et al, Environ.Sci.Technol.2008, 42, 8959-8964) . For example: studies have shown that the toxicity of nano-silver is closely related to various factors such as its particle size, surface charge, surface modifiers, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/74
Inventor 刘景富谭志强阴永光
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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