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Graphene-Co3O4 solid phase microextraction probe and preparation method thereof

A graphene and probe technology, applied in the field of graphene-Co3O4 solid-phase microextraction probe and its preparation, can solve the problems of high price, poor stability, short life, etc., and achieve simple method, good stability and binding good effect

Active Publication Date: 2020-09-15
广州金谷科学仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current solid-phase microextraction probes are mainly based on f

Method used

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  • Graphene-Co3O4 solid phase microextraction probe and preparation method thereof

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Effect test

Embodiment 1

[0024] A graphene-Co3O4 solid-phase microextraction probe, its preparation method is as follows:

[0025] (1) Clean and dry the metal titanium wire for later use;

[0026] (2) Prepare cobalt salt solution, the concentration of cobalt salt is 20g / L, the concentration of urea is 15 / L, the concentration of ammonium fluoride is 6g / L, just stir evenly;

[0027] (3) Put the cobalt salt solution in a polytetrafluoroethylene reactor, and at the same time put the cleaned titanium wire into the reactor, and conduct a hydrothermal reaction at 130°C for a reaction time of 8 hours;

[0028] (4) After the reaction, wash with deionized water and ethanol in turn, and dry in vacuum at 80°C for 2 hours to obtain 3 o 4 Titanium wires of nanowire arrays;

[0029] (5) Deposit the surface with Co 3 o 4 The metal titanium wire of the nanowire array is placed in the electron cyclotron plasma sputtering deposition chamber, and the vacuum is evacuated to 1×10 -4 Argon gas was introduced at Pa to ...

Embodiment 2

[0031] A graphene-Co3O4 solid-phase microextraction probe, its preparation method is as follows:

[0032] (1) Clean and dry the metal titanium wire for later use;

[0033] (2) Prepare cobalt salt solution, the concentration of cobalt salt is 10g / L, the concentration of urea is 10g / L, the concentration of ammonium fluoride is 5g / L, just stir evenly;

[0034] (3) Put the cobalt salt solution in a polytetrafluoroethylene reactor, and at the same time put the cleaned titanium wire into the reactor, and conduct a hydrothermal reaction at 120°C for a reaction time of 4 hours;

[0035] (4) After the reaction, wash with deionized water and ethanol in turn, and dry in vacuum at 80°C for 2 hours to obtain 3 o 4 Titanium wires of nanowire arrays;

[0036] (5) Deposit the surface with Co 3 o 4 The metal titanium wire of the nanowire array is placed in the electron cyclotron plasma sputtering deposition chamber, and the vacuum is evacuated to 1×10 -4 Argon gas was introduced at Pa to...

Embodiment 3

[0038] A graphene-Co3O4 solid-phase microextraction probe, its preparation method is as follows:

[0039] (1) Clean and dry the metal titanium wire for later use;

[0040] (2) Prepare cobalt salt solution, the concentration of cobalt salt is 50g / L, the concentration of urea is 25g / L, the concentration of ammonium fluoride is 8g / L, just stir evenly;

[0041] (3) Put the cobalt salt solution in a polytetrafluoroethylene reactor, and at the same time put the cleaned titanium wire into the reactor, and conduct a hydrothermal reaction at 140°C for 10 hours;

[0042] (4) After the reaction, wash with deionized water and ethanol in turn, and dry in vacuum at 80°C for 2 hours to obtain 3 o 4 Titanium wires of nanowire arrays;

[0043] (5) Deposit the surface with Co 3 o 4 The metal titanium wire of the nanowire array is placed in the electron cyclotron plasma sputtering deposition chamber, and the vacuum is evacuated to 1×10 -4 Argon gas was introduced at Pa to keep the pressure...

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Abstract

The invention relates to a graphene-Co3O4 solid-phase microextraction probe. A base body of the probe is a metal titanium wire, and the probe is characterized in that a Co3O4 nanowire array and graphene nanocrystals are sequentially deposited on the surface of the metal titanium wire. The Co3O4 nanowire array is prepared by a hydrothermal method; the graphene nanocrystal is obtained through electron cyclotron plasma sputtering deposition. The graphene two-dimensional nano material is fully utilized and has a large specific surface area, so that the probe has good extraction and enrichment effects, and the probe is high in sensitivity and good in stability. The magnetic Co3O4 nanowire array is directly deposited between the metal titanium wire and the graphene nanocrystal, the probe can optimize the extraction effect by applying an external magnetic field in the process of treating a sample, and the method is simple and convenient.

Description

technical field [0001] The invention relates to the field of solid-phase microextraction probes, in particular to a graphene-Co 3 o 4 Solid-phase microextraction probe and its preparation method. Background technique [0002] Solid Phase Microextraction (SPME) technology is a sample analysis and determination technology, which can be used in conjunction with gas chromatography, liquid chromatography, mass spectrometry, electrophoresis and other instruments, and is widely used in food analysis, environmental analysis, biological sample analysis, Drug analysis and other fields. [0003] Solid-phase microextraction probe is the core component of solid-phase microextraction technology. However, the current solid-phase microextraction probes are mainly based on fused silica fibers, which are expensive, poor in stability, and short in life. It is necessary to develop new solid-phase microextraction probes with high sensitivity, good stability, low cost, and environmental prote...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/40G01N21/76G01N27/26B01J20/20B01J20/281
CPCG01N1/28G01N1/40G01N21/76G01N27/26B01J20/20B01J20/06B01J20/281
Inventor 张瑞秀
Owner 广州金谷科学仪器有限公司
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