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Adsorption and elution method used in gas chromatography-mass spectrometer (GC-MS) analysis and sample preparation of water trace polychlorinated biphenyls

A GC-MS, polychlorinated biphenyl technology, applied in the field of analysis and testing, can solve problems such as unsatisfactory elution technology, and achieve the effect of improving elution operation efficiency and elution rate

Inactive Publication Date: 2013-02-20
NINGBO UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is to develop a new elution method that helps to solve this problem in view of the unsatisfactory elution technology in the sample preparation program for the analysis and testing of trace PCBs in water

Method used

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Embodiment Construction

[0034] The implementation of the method in this case includes the following steps:

[0035] a. Insert a rod-shaped or probe-shaped ultrasonic probe into the inner cavity of the syringe, and make the working end of the ultrasonic probe close to the bottom of the inner cavity of the syringe;

[0036]b, connecting the rod-shaped or probe-shaped ultrasonic probe with one end of the high-frequency oscillation electrical signal transmission cable;

[0037] c, connecting the other end of the high-frequency oscillating electrical signal transmission cable to the high-frequency oscillating electrical signal generator;

[0038] d. A syringe filter is installed at the end of the syringe, and the filter membrane pore size of the syringe filter is between 0.05 micron and 1.00 micron;

[0039] e, moving the adsorbent that has captured and adsorbed the target substance from the water body into the inner cavity of the syringe, and the target substance is polychlorinated biphenyls;

[0040] ...

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Abstract

The invention relates to an adsorption and elution method used in gas chromatography-mass spectrometer (GC-MS) analysis and sample preparation of water trace polychlorinated biphenyls and belongs to the field of analysis and testing. The adsorption and elution method aims at solving the problems that the existing method for eluting a target object in a GC-MS analysis and sample preparation program of water trace polychlorinated biphenyls is not satisfactory. The adsorption and elution method comprises the steps of a, inserting a rod-shaped or needle-shaped ultrasonic probe into a cavity of a needle cylinder, and radiating ultrasonic wave to the area where adsorbent is positioned in the cavity of the needle cylinder, wherein the frequency of the ultrasonic wave ranges from 100KHz and 12MHz; and b, intermittently communicating a filter of the needle cylinder with a negative pressure source for suction filtration for 0.05 minutes to 30.00 minutes every other 0.05 minutes to 30.00 minutes when the rod-shaped or needle-shaped ultrasonic probe continuously and uninterruptedly radiates the ultrasonic wave to the area where the adsorbent is positioned in the cavity of the needle cylinder. The mechanism of the adsorption and elution method is that the ultrasonic wave promotes desorption and mass transfer before the suction filtration and stops re-adsorption during the suction filtration.

Description

technical field [0001] The invention relates to an adsorption and elution method in water body trace polychlorinated biphenyl GC-MS analysis sample preparation, belonging to the field of analysis and testing. Background technique [0002] For the origin of trace PCBs in environmental water and the necessity of analysis and detection, please refer to the Chinese invention patent application 201210099400.3. [0003] The GC-MS analysis refers to a gas chromatography-mass spectrometry combined analyzer, and the designation and technical meaning of the GC-MS character group are well known to professionals in the field of analysis and testing technology. [0004] In the analysis and detection of trace polychlorinated biphenyls in environmental water, the GC-MS method has advantages, which has been described in detail in the above-mentioned Chinese invention patent application 201210099400.3. [0005] According to the detailed introduction of Chinese invention patent application 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06
Inventor 李榕生曾少林干宁周汉坤李天华孙杰孔祖萍任元龙
Owner NINGBO UNIV
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