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Needle extraction device for enriching volatile benzene series and using method of needle extraction device

An extraction device and technology of benzene series, applied in the field of analytical chemistry, can solve problems such as poor permeability, difficult preparation, and low reproducibility, and achieve the effects of good sealing, good repeatability, and easy operation

Pending Publication Date: 2018-03-30
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to invent a device suitable for high enrichment efficiency of trace benzene series in the adsorption environment. The device has the advantages of short enrichment time, simple operation and high specificity and selectivity. The device can overcome the existing It has the disadvantages of poor permeability, low reproducibility, and difficult preparation in the needle extraction technology, and it can be used in conjunction with gas chromatography, which is easy to use and provides a new extraction method for the accurate analysis and detection of trace gases. technology

Method used

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  • Needle extraction device for enriching volatile benzene series and using method of needle extraction device
  • Needle extraction device for enriching volatile benzene series and using method of needle extraction device
  • Needle extraction device for enriching volatile benzene series and using method of needle extraction device

Examples

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Embodiment 1

[0031] Such as Figure 1~4 As shown, a needle-type extraction device for enriching volatile benzene series, the needle-type extraction device includes a high-temperature-resistant stainless steel needle 1 with a needle seat 2, which is airtight with the needle seat 2 in a detachable manner The connected expansion syringe 3, the reinforced air guiding device 6 connected to the tail of the expansion syringe 3 through a sealed connection base 5, and the air extraction device 10 or gas injection device 11 detachably connected to the tail of the reinforced air guiding device 6; The expansion syringe 3 is filled with solid-phase adsorbent 4, and the outer wall of the syringe is provided with a heat conduction device (heating wire 15 in this embodiment), the heat conduction device is connected with a temperature controller 8, and the expansion syringe 3 is Thermally conductive metal material (copper in this embodiment).

[0032] In this embodiment, the air extraction device 10 is a ...

Embodiment 2

[0040] In this example, the needle-type extraction device for enriching volatile benzene series described in Example 1 is used for gas extraction and sample injection, including the following steps:

[0041] 1) Before sampling the sample, first heat the expansion syringe 3 to 280°C and age for 5-10 minutes;

[0042] 2) After the syringe is cooled, fill the syringe with adsorbent 4 and seal the needle 1;

[0043] 3) Insert the needle 1 into the sampling source 9, and use the air extraction device 10 (using a pump) to sample;

[0044] 4) After the sampling is completed, replace the air extraction device 10 with the gas injection device 11 (5ml medical syringe), and the gas injection device extracts part of the inert gas 12 in advance;

[0045] 5) Start the temperature controller 8 and start heating the expansion syringe 3;

[0046]6) When the temperature of the heat conduction device of the expansion syringe 3 reaches the specified temperature, insert the needle 1 into the gas...

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Abstract

The invention discloses a needle extraction device for enriching volatile benzene series and a using method of the needle extraction device. The device is provided with a stainless steel needle head,an expansion needle cylinder, a reinforcing air guide device and an air exhaust device or an air injection device, wherein the stainless steel needle head is provided with a needle base; the expansionneedle cylinder is detachably connected with the needle base in an airtight mode; the reinforcing air guide device is connected with the tail part of the expansion needle cylinder through a sealing connection base, and the air exhaust device or the air injection device is detachably connected with the tail part of the reinforcing air guide device in a sealed mode; the expansion needle cylinder isfilled with a solid-phase adsorbent, a heat conduction device is arranged on the outer wall of the needle cylinder, the heat conduction device is connected with a temperature controller, and the expansion needle cylinder is made of a heat conduction metal material. The device has the advantages of short enrichment time, simple operation and high specificity selectivity, the defects of poor permeability, low reproducibility, difficult preparation and the like in an existing needle extraction technology can be overcome, and the device can be combined with gas chromatography in use, is convenient to use and provides a novel extraction technology for accurate analysis and detection of trace gas.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry and is used for the analysis of volatile and semi-volatile organic compounds, specifically a needle-type extraction device for enriching volatile benzene series and its use method. The invention is based on molecular imprinting technology A new type of extraction technology developed based on the principle of specific recognition. Background technique [0002] In recent years, the phenomenon of air pollution in our country has become more and more serious. With the continuous progress of industrial development, the pollution caused by various organic substances has also followed. The benzene series that are volatilized from house decoration seriously endanger human health. However, since the benzene series in the air is usually in a trace amount, which cannot reach the detection line of the instrument, and quantitative analysis cannot be realized, it is very necessary to invent a nee...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/08
CPCG01N30/06G01N30/08G01N2030/062
Inventor 娄大伟郭晓阳徐阳祝波张潇予连丽丽张浩王希越高文秀陈慧君田媛媛
Owner JILIN INST OF CHEM TECH
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