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Molecular engram integral-pin type extraction device suitable for gas chromatography analysis

A gas chromatographic analysis and extraction device technology, which is applied to measurement devices, analytical materials, material separation, etc., can solve the problems of poor stability and repeatability of extraction devices, unfavorable large-scale production, and uniform distribution of difficult media, and achieves easy scale. Production, high selectivity, good reproducibility

Inactive Publication Date: 2012-04-18
娄大伟 +1
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Problems solved by technology

However, whether it is a commercial adsorbent or self-synthesized extraction material, when filling these media into the needle device, due to the small inner diameter of the needle barrel, they all face the problem of difficult filling and uniform distribution of the media, which will lead to the stability of the extraction device. And poor repeatability, and not conducive to large-scale production and other shortcomings

Method used

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  • Molecular engram integral-pin type extraction device suitable for gas chromatography analysis
  • Molecular engram integral-pin type extraction device suitable for gas chromatography analysis
  • Molecular engram integral-pin type extraction device suitable for gas chromatography analysis

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Embodiment Construction

[0015] The usage and characteristics of the present invention are further described in conjunction with accompanying drawings and examples.

[0016] figure 1 It is a structural schematic diagram of a molecularly imprinted integral needle-type extraction device of the present invention. The device is composed of a 21G or 22G standard stainless steel needle 1 and an integral molecularly imprinted polymer extraction medium 2 .

[0017] figure 2 and image 3 It is a schematic diagram of connecting the integral needle extraction device with a commercial AP-20 gas collector, or a large-volume gas-tight syringe. The sampling and extraction process will be described in detail below with four benzene series at low concentrations as target analytes. Use inert gas in the gas sampling bag 3 to prepare standard gases of trace amounts of benzene, toluene, ethylbenzene, ortho-xylene. The gas-tight syringe 6 is connected and inserted into the gas sampling bag, the gas collector is turne...

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Abstract

The invention relates to a molecular engram integral-pin type extraction device suitable for gas chromatography analysis. The device is composed of a high-temperature resistant stainless steel pin and an integral extraction medium in a pin case; the extraction medium is synthesized by one-step reaction according to the molecular engram integral column technology without filling. The device can be connected with a gas collector or an airtight type injector so as to sample, extract and concentrate a specific component in a complex gas sample. The extraction device provided by the invention is designed according to a sample feeding structure of the gas chromatography; the extracted target analyte can be subjected to the thermal desorption with the auxiliary gas as carrier gas under the condition of high temperature in a vaporizing chamber so as to be further separated and detected in the gas chromatography. The device not only has the effects of sampling, extracting and concentrating, but also has the function of storing the sample. When the sample cannot be detected in real time, two ends of the device can be sealed by end caps after sampling, then the sample is stored and the subsequent analysis can be performed as demanded.

Description

technical field [0001] The present invention relates to the development of a molecularly imprinted integral needle extraction device suitable for gas chromatography analysis, specifically, a more advanced new sample pretreatment technology device has been developed, and the development of the device adopts the monolithic column preparation technology , the reaction is completed in one step, without the need for solid adsorbent filling, and has better reproducibility and durability. The method is simple, efficient and beneficial to large-scale production. The invention belongs to the technical field of analytical chemistry, and the device can be applied to environmental analysis. Background technique [0002] In recent years, molecularly imprinted monolithic column (molecularly imprinted monolithic column) technology and its application research in various fields have attracted widespread attention of scholars at home and abroad. Molecularly imprinted polymer (MIP) is a new...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/08
Inventor 娄大伟孙秀云祝波孙大志李忠玉欧俊杰黄光蒲平立谭波
Owner 娄大伟
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