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Preparation method of metal carrier extracting rod

A technology of metal carrier and extraction rod, which is applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of SBSE technical limitations and high prices, and achieve high mechanical strength and thermal stability Good, strong adsorption effect

Inactive Publication Date: 2013-02-20
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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  • Preparation method of metal carrier extracting rod
  • Preparation method of metal carrier extracting rod
  • Preparation method of metal carrier extracting rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 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.

[0033] Wherein the epoxy resin is a polyfunctional glycidyl type epoxy resin, which is available in the market.

Embodiment 2

[0035] 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-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.

Embodiment 3

[0037] 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 a preparation method of a metal carrier extracting rod, which comprises the steps of: 1, selecting and preprocessing a metal rod body; 2, synthesizing heat-resistant epoxy resin; 3, manufacturing a stirring rod coating; 4, curing the coating; and 5, removing impurities of the extracting rod body. In the method, when the extracting rod is used in a stirring manner, the metal is iron, nickel, cobalt, stainless steel or alloy; and when the extracting rod is used in a headspace or ultrasonic manner, the metal is stainless steel, copper, aluminum or alloy. The metal rod is replaced with the traditional glass rod to ensure that the metal rod has higher mechanical strength and is firm and durable. A manner of binding an absorbing agent on the stirring rod is more beneficial to the treatment of the absorbing agent to a liquid sample and the static headspace collection.

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 The invention relates to a preparation method of a coating stirring extraction rod, and the extraction rod prepared by the method is suitable for 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 hav...

Claims

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Application Information

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