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Metal carrier solid phase microextraction fiber

A technology for extracting fibers and metal carriers, applied in alkali metal compounds, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of easy breakage of the extraction head, achieve good thermal stability, high mechanical strength, thermal Highly stable effect

Inactive Publication Date: 2012-09-26
TIANJIN CHUNFA BIO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the extraction head is easily broken during use

Method used

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  • Metal carrier solid phase microextraction fiber
  • Metal carrier solid phase microextraction fiber
  • Metal carrier solid phase microextraction fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Select a stainless steel fiber with a length of 20mm and a diameter of 0.35mm, corrode it with concentrated HF for 30min, take it out, wash it with distilled water until it is neutral, and use N 2 Blow dry; weigh 100g of epoxy resin, add xylene and stir until completely dissolved, then add 15g of pyromellitic anhydride, 15g of tertiary amine and 20g of asbestos powder in turn, stir to make each component disperse evenly, and obtain high temperature resistant epoxy resin Resin; apply a layer of high-temperature resistant epoxy resin on the surface of the treated stainless steel fiber, then dip a layer of Carbograph on the outer layer, and place it in an oven for curing at 180°C for 60 minutes; put the extracted fiber cured at high temperature on the cable In the type extractor, dichloromethane was used to reflux at 60°C for 40 minutes to obtain extraction fibers.

[0029] Wherein the epoxy resin is a polyfunctional glycidyl type epoxy resin, which is available in the mar...

Embodiment 2

[0031] Select a stainless steel fiber with a length of 20mm and a diameter of 0.35mm, corrode it with concentrated HF for 40min, take it out, wash it with distilled water until it is neutral, and use N 2 Blow dry; apply a layer of silicone resin on the surface of the treated stainless steel fiber, then dip a layer of clay on the outer layer, put it in an oven and cure it at 180°C for 60 minutes, and place the extracted fiber cured at high temperature in Soxhlet In the extractor, dichloromethane was used to reflux at 60°C for 40 minutes to obtain extraction fibers.

Embodiment 3

[0033] The organic matter in the river water was analyzed by using the extraction fiber prepared in Example 1, and extracted by immersion.

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Abstract

The invention discloses a metal carrier solid phase microextraction fiber, and relates to the field of trace analysis of organic matters in foods, environment and biological samples. The metal carrier solid phase microextraction fiber consists of a carrier, and a coating on the surface of the carrier, wherein the carrier is a metal fiber with the length of 10 to 40mm and the diameter of 0.1 to 0.5mm; the coating comprises an adsorbent layer and a heat-resistant epoxy resin layer or organic silicon resin layer; and the adsorbent is one or more of graphitized carbon black, silica gel and clay. The extraction fiber has porous surface, high thermal stability and high adsorption capacity without retaining water, and is particularly suitable for analyzing trace contaminants in water and air.

Description

technical field [0001] The invention relates to the field of trace analysis of organic matter in food, environment and biological samples, in particular to a metal carrier solid-phase micro-extraction fiber. Background technique [0002] Solid phase microextraction (solid phase microextraction, SPME) technology is a novel sample pretreatment technology. In 1989, Belardi and Pawliszynl of the University of Waterloo in Canada reported SPME technology for the first time; in 1993, Supelco Company of the United States launched a commercialized SPME device; in 1995, Chen and Pawliszynl designed solid-phase microextraction-high performance liquid chromatography (SPME- HPLC) with an interface device and is commercially available from Supelco. In 1997, Eisert and Pawliszyn designed an automatic sampling SPME-HPLC coupling device-in-tube (In-tube) SPME-HPLC coupling device; in 1997, Nguyen et al. ) online combination. In addition, SPME can also be used in conjunction with Fourier t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/32B01D15/08
Inventor 邓莉郝学财邢海鹏
Owner TIANJIN CHUNFA BIO TECH GRP