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Sample preparation device for elution of PCBs (polychlorinated biphenyls) in environmental water analysis

An environmental water and link technology, applied in the field of analysis and testing, can solve problems such as unsatisfactory target elution technology

Inactive Publication Date: 2013-02-27
NINGBO UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0015] The technical problem to be solved by the present invention is, aiming at the unsatisfactory present situation that the elution technology of the target substance in the sample preparation procedure of environmental water trace polychlorinated biphenyl gas-mass spectrometry detection is unsatisfactory, develop a new elution device for

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  • Sample preparation device for elution of PCBs (polychlorinated biphenyls) in environmental water analysis

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Embodiment Construction

[0033] exist figure 1 In the shown embodiment of the case, the structure of the device includes a syringe 1, and a syringe filter 5, one port of the syringe filter 5 is socketed with the injection port of the syringe 1, and the point is that the The structure of the device also includes an ultrasonic transducer 2, and an ultrasonic transducer protective shell 9, which is a box or drum, and the ultrasonic transducer 2 is mounted on Inside the ultrasonic transducer protective case 9, a ring is respectively installed on both sides of the ultrasonic transducer protective case 9, and the installation of the rings 4, 7 on the ultrasonic transducer protective case 9 The method is fixed installation or hinged installation. The fixed installation method is shown in the legend, and the hinged installation method is not shown in the legend. The connection method referred to by the word hinged is for mechanical professionals. Its technical meaning is well-known, and there is no need to e...

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Abstract

The invention relates to a sample preparation device for elution of PCBs (polychlorinated biphenyls) in environmental water analysis, belonging to the field of analytical testing. The prior art of GC-MS (gas chromatography-mass spectrometer) analysis of elution of a target substance in a sample preparation procedure based on trace polychlorinated biphenyls in a water body is not satisfactory, and the sample preparation device is provided to solve the problem. According to the scheme, based on a structure of an elution device with a conventional syringe and a syringe filter, a protective shell with an ultrasonic transducer is dragged simultaneously from two sides through two adhesive tapes which are bonded in a butting way and are arranged to surround the syringe, so that the protective shell is positioned near the bottom of the syringe. When the device is used, elution is reinforced by the following mechanism: high-frequency ultrasonic waves are applied prior to connection of the syringe filter with a negative pressure source to strongly promote desorption and mass transfer of the target substance, irradiation of the high-frequency ultrasonic waves is still continuously maintained when the syringe filter is connected with the negative pressure source for suction filtration so as to strongly inhibit re-adsorption of the target substance in the suction filtration process. The device can be removed and installed conveniently.

Description

technical field [0001] The invention relates to a sample preparation device for the elution link of PCBs, which is applied to environmental water analysis, and belongs to the field of analysis and testing. Background technique [0002] The character group PCBs refers to polychlorinated biphenyls. The focus of this case is the elution of target substances in the sample preparation procedure for the detection of trace amounts of polychlorinated biphenyls in environmental water by gas-mass spectrometry. [0003] For the origin of trace PCBs in environmental water and the general background of their analysis and detection, please refer to the Chinese invention patent application 201210099400.3. [0004] Among the many detection methods for trace PCBs in environmental water, GC-MS is relatively accurate and reliable. The GC-MS analysis refers to gas chromatography-mass spectrometry combined analysis, and the designation and technical meaning of the GC-MS character group are well...

Claims

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Application Information

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IPC IPC(8): G01N30/06
Inventor 干宁任元龙李榕生李天华周汉坤孙杰孔祖萍曾少林
Owner NINGBO UNIV
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