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Stainless steel extraction stirring rod and preparation method thereof

A stainless steel rod and stirring rod technology, which is used in the field of analytical chemistry, can solve the problems of hard-to-extract materials fixed on stainless steel rods, complicated preparation, and easy damage to the glass layer, and achieves improved stability, strong chemical inertness, and enhanced stability. Effect

Active Publication Date: 2014-07-30
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this device is that the preparation is more complicated, and the glass layer is also easily damaged during the stirring and desorption process.
The current problem is that stainless steel is chemically inert and it is difficult to fix the extracted material on the stainless steel rod

Method used

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  • Stainless steel extraction stirring rod and preparation method thereof
  • Stainless steel extraction stirring rod and preparation method thereof
  • Stainless steel extraction stirring rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Weigh 20 mg of dopamine, dissolve it in 10 mL of Tris buffer with a concentration of 10 mmol / L, adjust the pH to 8.5, inject oxygen, and stir until the solution turns light reddish brown.

[0026] 2) Take a stainless steel rod with a diameter of about 0.5 mm and a length of 3 cm, wash it thoroughly with methanol, and dry it; immerse it in the dopamine solution prepared in 1), and let it react at room temperature for 10 h; take it out, wash it with water, and dry it in an oven Dry to obtain polydopamine-modified stainless steel rods.

[0027] 3) Prepare a 1 mg / mL graphene oxide aqueous solution, immerse the above-mentioned polydopamine-modified stainless steel rod in it, seal the reaction vessel, and place it in a water bath at 60 °C for 6 h; take it out, wash it with water, and put it in an oven within 65°C for 2 h;

[0028] 4) Take out the stainless steel rod, repeat the above step 2) and step 3) twice in order to obtain a three-layer graphene-modified stainless st...

Embodiment 2

[0031] 1) Weigh 10 mg of dopamine, dissolve it in 10 mL of Tris buffer with a concentration of 10 mmol / L, adjust the pH to 9, and shake the solution until the solution turns light reddish brown.

[0032] 2) Take a stainless steel rod with a diameter of about 2 mm and a length of 5 cm, wash it thoroughly with methanol, and dry it; immerse it in the dopamine solution prepared in 1), and let it react at room temperature for 15 h; take it out, wash it with water, and dry it in an oven Dry to obtain polydopamine-modified stainless steel rods.

[0033] 3) Prepare a 2 mg / mL graphene oxide aqueous solution, immerse the above-mentioned polydopamine-modified stainless steel rod in it, seal it, and place it in a water bath at 65 °C for 10 h; take it out, wash it with water, and place it in an oven at 75 °C Under heating for 3 h, a single-layer graphene-modified stainless steel extraction stirring rod was obtained.

Embodiment 3

[0035] 1) Weigh 20 mg of dopamine, dissolve it in 10 mL of Tris buffer with a concentration of 10 mmol / L, adjust the pH to 8.5, inject oxygen, and stir until the solution turns light reddish brown.

[0036] 2) Take a stainless steel rod with a diameter of about 0.5 mm and a length of 3 cm, wash it thoroughly with methanol, and dry it; immerse it in the dopamine solution prepared in 1), and let it react at room temperature for 12 h; take it out, wash it with water, and dry it in an oven Dry to obtain polydopamine-modified stainless steel rods.

[0037] 3) Prepare a 1 mg / mL graphene oxide aqueous solution, immerse the above-mentioned polydopamine-modified stainless steel rod in it, seal the reaction vessel, and place it in a water bath at 60 °C for 8 h; take it out, wash it with water, and put it in an oven Inside, heat at 70°C for 2 h;

[0038] 4) Take out the stainless steel rod, and repeat step 2) and step 3) 5 times in order to obtain a 6-layer graphene-modified stainless s...

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Abstract

The invention discloses a stainless steel extraction stirring rod and a preparation method thereof, and belongs to the field of analytical chemistry. The preparation method is as follows: dipping a stainless steel rod into an oxidized dopamine alkaline solution, washing, drying to prepare a poly dopamine modified stainless steel rod; dipping the poly dopamine modified stainless steel rod into a graphene oxide solution, sealing, heating for reacting, drying to obtain the stainless steel extraction stirring rod. The stainless steel extraction stirring rod is successively repeatedly dipped into the oxidized dopamine alkaline solution and the graphene oxide solution, and then a multilayer graphene modified stainless steel extraction stirring rod can be prepped. The preparation method is simple without adding of pollutional reducing agents, the coating stability is strong, and the thickness can be controllable. The stainless steel extraction stirring rod prepared by the method has very good enrichment effect on polycyclic aromatic hydrocarbons and other compounds, can be combinedly used with liquid chromatography, and is suitable for enrichment and analysis of the polycyclic aromatic hydrocarbons in the environment, food and other fields.

Description

technical field [0001] The invention relates to a stainless steel extraction stirring rod and a preparation method thereof, belonging to the field of analytical chemistry. technical background [0002] Graphene is a carbon atom with sp 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. Due to the strong flexibility of the connections between the carbon atoms in graphene, when a mechanical force is applied, the surface of the carbon atoms will bend and deform, and the carbon atoms do not need to be rearranged to adapt to the external force and maintain the stability of its crystal structure. This property gives graphene excellent mechanical, optical and electrical properties. At present, graphene has a wide range of applications, such as field effect transistors, sensors, energy storage, supercapacitors, etc. Graphene also has a large specific surface area, up to 2700 m 2 / g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/286B01J20/30B01D15/08
Inventor 陈子林张文鹏
Owner WUHAN UNIV
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