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Solid phase microextraction coating and preparation method thereof

A coating and extraction technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of non-extractable coating, short service life, poor heat resistance, etc., and achieve cheap consumables and short preparation time. , good reproducibility

Inactive Publication Date: 2013-04-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some commercial coatings have appeared on the market, but they are generally expensive and have many disadvantages, such as poor heat resistance, most coatings do not have extraction selectivity, short service life, etc.

Method used

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  • Solid phase microextraction coating and preparation method thereof
  • Solid phase microextraction coating and preparation method thereof
  • Solid phase microextraction coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Immerse 3 cm of the front ends of four 15 cm long stainless steel wires in a hydrofluoric acid solution heated at 80°C and corrode for 10 min to make the stainless steel wires form a rough surface, wash them with secondary water and dry them in an oven at 60°C before use .

[0023] Accurately weigh 1.02 g of aluminum chloride hexahydrate and 1.12 g of 2-aminoterephthalic acid into a beaker, add 60 mL of nitrogen-nitrogen dimethylformamide, and stir in a magnetic stirrer to dissolve it. The dissolved solution was divided into 4 microwave reaction tanks, each 15mL, the corroded stainless steel wire was inserted into the solution, the lid was closed, and the reaction tank was put into the microwave for reaction. The reaction conditions were as follows: the temperature was raised to 130 °C within 2 min, and the power was 600 W; the temperature was kept at 130 °C for 6 h, and the power was 400 W. After the reaction was completed, the stainless steel wire was taken out, rins...

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Abstract

The invention provides a solid phase microextraction coating using NH2-MIL-101(Al) as materials and a preparation method thereof. The method comprises the following steps: putting stainless steel wires in 60-80 EG C of hydrofluoric acid to be corroded to form a rough surface; taking aluminum chloride hexahydrate and 2-aminoterephthalic acid, dissolving with N, N-dimethylformamide, carbinol or chloroform, and then separately putting solutions in a microwave reaction tank; and immersing the corroded stainless steel wires in the microwave reaction tank, reacting for 5-6 hours at 120-130 DEG C, then washing with secondary water, and drying for the night at 80-100 DEG C. The method has simple operation and short preparation time. The prepared coating has the advantages of good resistance to high temperature, high chemical stability, good reproducibility, high enrichment coefficient, low cost and wide application range, and can be used for separation and enrichment of substances such as polycyclic aromatic hydrocarbon, pesticides and the like.

Description

technical field [0001] The invention belongs to the preparation field of SPME coating in sample pretreatment, be specifically related to a kind of NH 2 - MIL-101(Al) is a solid-phase microextraction coating and its preparation method. Background technique [0002] Sample pretreatment is the most important link in the entire analysis process. SPME technology is a sample pretreatment technology first developed by Pawlizyn J's research group in 1989. This technology integrates sampling, extraction, concentration and sample injection, and has the advantages of simple operation, short analysis time, no need for a large amount of organic solvent, and less sample required. Among them, the coating material is the core part of SPME technology, which determines the selectivity and sensitivity of the entire analytical method. At present, some commercial coatings have appeared on the market, but they are generally expensive and have many disadvantages, such as poor heat resistance, mo...

Claims

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Application Information

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IPC IPC(8): B01J20/282B01J20/32
Inventor 张兰刘薇蔡艺敏蔡宗苇陈国南
Owner FUZHOU UNIV
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