Aluminum oxide coating stirring extraction rod of metal carrier

A technology for extracting rods and alumina, applied in the directions of alkali metal oxides/hydroxides, alkali metal compounds, inorganic chemistry, etc., can solve the problems of SBSE technical limitations and high prices, avoid competitive adsorption, high mechanical strength, thermal good stability

Inactive Publication Date: 2011-03-30
TIANJIN CHUNFA BIO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, commercialized SBSE devices only have a stationary phase coating of PDMS, and the price of commercialized SBSE devices is relatively high, so the application of SBSE technology is greatly restricted.

Method used

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  • Aluminum oxide coating stirring extraction rod of metal carrier
  • Aluminum oxide coating stirring extraction rod of metal carrier
  • Aluminum oxide coating stirring extraction rod of metal carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An iron rod with a length of 25 mm and a diameter of 2 mm was selected, and its surface was pretreated with dichloromethane. Weigh 100g of epoxy resin, add xylene and stir until it is completely dissolved, then add 15g of pyromellitic anhydride, 15g of tertiary amine, and 20g of asbestos powder in sequence, and stir to disperse the components evenly to obtain a high-temperature resistant epoxy resin. Coat the surface of the treated iron rod with a layer of high temperature resistant epoxy resin, and then dip a layer of r-Al on the outer layer 2 o 3 Adsorbent, put the rod in an oven and cure at 180°C for 60 minutes. The prepared extraction rod was placed in a Soxhlet extractor, and refluxed with dichloromethane at 60° C. for 40 min.

[0039] Wherein the epoxy resin is a polyfunctional glycidyl type epoxy resin, which is available in the market.

Embodiment 2

[0041] A nickel rod with a length of 25 mm and a diameter of 2 mm was selected, and its surface was pretreated with dichloromethane. Coat the surface of the treated rod with a layer of silicone resin, and then dip a layer of r-Al2O3 adsorbent on the outer layer, and place the rod in an oven at 180°C for 60 minutes to cure. The prepared extraction rod was placed in a Soxhlet extractor, and refluxed with dichloromethane at 60° C. for 40 min.

Embodiment 3

[0043] A stainless steel rod with a length of 25 mm and a diameter of 2 mm was selected, and its surface was pretreated with dichloromethane. Coat the surface of the treated rod with a layer of silicone resin, then dip a layer of titanium dioxide on the outer layer, and place the rod in an oven at 180°C for 60 minutes to cure. The prepared extraction rod was placed in a Soxhlet extractor, and refluxed with dichloromethane at 60° C. for 40 min.

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Abstract

The invention relates to an aluminum oxide coating stirring extraction rod of a metal carrier. The carrier of the extraction rod is metal, and the coating of the extraction rod contains an adsorbent. When the extraction rod is used in a stirring mode, the metal is iron or nickel or cobalt or stainless steel or alloy; when the extraction rod is used in a headspace or ultrasonic mode, the metal is the stainless steel or copper or aluminum or the alloy. The adsorbent is a metal oxide adsorbent. The extraction rod has higher mechanical strength and is sturdy and durable by replacing the traditional glass rod with a metal rod; and a mode that the adsorbent is combined to the stirring rod is more beneficial to the treatment and the static headspace trapping of liquid samples by the adsorbent.

Description

technical field [0001] The invention belongs to the field of trace analysis of organic matter in food, environment and biological samples, in particular to a metal carrier r-Al 2 o 3 Coated and stirred extraction rod, which is suitable for the enrichment of heterocyclic rings containing nitrogen, phosphorus, and sulfur groups, aromatic hydrocarbons, and organic amines. Background technique [0002] Due to the complex matrix and composition of most analyzed samples, sample pretreatment is usually an indispensable and important step in sample analysis. It plays the role of concentrating the measured trace components, improving the sensitivity of the method and cleaning the sample. [0003] Traditional sample pretreatment methods include liquid-liquid extraction, Soxhlet extraction, chromatography, distillation, adsorption, centrifugation, and filtration, etc., but these methods generally have the disadvantages of using a large amount of organic solvents, long processing time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/32B01D15/08
Inventor 邓莉郝学财邢海鹏
Owner TIANJIN CHUNFA BIO TECH GRP
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