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Porous film-protected nano-material solid-phase micro-extraction device and application thereof

A nano-material and extraction device technology, applied in the field of extraction, can solve the problems of high relative price, poor recovery rate and sensitivity, and short service life, and achieve the effects of less reagent consumption, good thermal stability, and strong corrosion resistance

Active Publication Date: 2020-10-30
HANGZHOU VOCATIONAL & TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Poor recovery and sensitivity when complex sample matrices are present
Short service life, relatively high price

Method used

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  • Porous film-protected nano-material solid-phase micro-extraction device and application thereof
  • Porous film-protected nano-material solid-phase micro-extraction device and application thereof
  • Porous film-protected nano-material solid-phase micro-extraction device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 , the porous membrane-protected nanomaterial solid-phase microextraction device of the present embodiment includes a porous polyvinylidene fluoride membrane 1, and the porous polyvinylidene fluoride membrane 1 is closed around to form a cavity 2, and the cavity 2 is filled with TiO 2 / ZIF-8 / carbon nanotubes.

[0031] The specific assembly method of the porous membrane-protected nanomaterial solid-phase microextraction device of this embodiment is: take a porous polyvinylidene fluoride membrane with a length of 10 cm and a width of 8 cm, and fold it in half at a distance of 0.5 cm from the edge of one side in the length direction. Seal the edge of the overlapped end along the width direction with heated scissors, then cut off the part that has been sealed along the width direction, and cut it into multiple 0.8cm long sections, each section is open up and down, after sealing one of the openings, from the opening Inject 25mg of TiO 2 / ZIF-8 / carbon nanotu...

Embodiment 2

[0049] Such as figure 1 , the porous membrane-protected nanomaterial solid-phase microextraction device of the present embodiment includes a porous polyvinylidene fluoride membrane 1, and the porous polyvinylidene fluoride membrane 1 is closed around to form a cavity 2, and the cavity 2 is filled with TiO 2 / ZIF-8 / carbon nanotubes.

[0050] The specific assembly method of the porous membrane-protected nanomaterial solid-phase microextraction device of this embodiment is the same as that of Embodiment 1.

[0051] TiO described in this example 2 The preparation method of / ZIF-8 / carbon nanotube is:

[0052] S1. Add carbon nanotubes to an aqueous solution of nitric acid with a mass fraction of 68%. After ultrasonication for 10 minutes, reflux at a temperature of 150° C. for 12 hours, and perform solid-liquid separation on the obtained reflux liquid. Wash with deionized water until the pH value is 7.0, and obtain activated carbon nanotubes after drying; the tube length of the c...

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Abstract

The invention provides a porous film-protected nano-material solid-phase micro-extraction device. The device comprises a porous polyvinylidene fluoride membrane, wherein the periphery of the porous polyvinylidene fluoride membrane is closed to form a cavity, and the cavity is filled with TiO2 / ZIF-8 / carbon nanotubes. The invention also provides the application of the device to detection of trace organic substances. The device is slightly influenced by a matrix during substance detection, can be repeatedly used, saves time and is low in cost, low in reagent consumption and high in enrichment efficiency, and the application field of the film solid-phase micro-extraction device is widened.

Description

technical field [0001] The invention belongs to the technical field of extraction, and in particular relates to a solid-phase microextraction device for protecting nanomaterials with a porous membrane and an application thereof. Background technique [0002] Commercial solid-phase microextraction device, such as the solid-phase microextraction device produced by SUPELCO Company of the United States. Using fused silica optical fiber as the matrix support, it adopts the characteristics of "similar and miscible", coats its surface with thin layers of polymer stationary phases of different properties, and extracts, enriches, and Injection and analysis. Then the fiber enriched with the analyte is directly transferred to the instrument (GC or HPLC), desorbed in a certain way (thermal desorption or solvent desorption), and then separated and analyzed. However, commercial solid-phase microextraction devices have the disadvantage of poor stability of the extraction head. Fused sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/10G01N30/02G01N30/06G01N30/68G01N30/86
CPCB01D15/10G01N30/02G01N30/06G01N30/68G01N30/8675G01N2030/062
Inventor 王聪
Owner HANGZHOU VOCATIONAL & TECHN COLLEGE
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