Sample pretreatment device and sample treatment method
A sample pretreatment and extraction device technology, which is applied in the field of sample pretreatment devices, can solve problems such as heavy labor workload, human body and environmental hazards, and complexity, and achieve the effect of simplifying manual processing, simple and convenient operation, and reducing time
Active Publication Date: 2015-04-01
BEIJING POLYTECH INSTR
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Problems solved by technology
[0004] At present, the pretreatment methods for the detection standards of persistent organic pollutants such as dioxins and polychlorinated biphenyls mainly rely on manual operations. Inaccurate test reports are often obtained, and the reliability of quantitative test results cannot be guaranteed
Manual operation is not only complicated, but also easy to cause harm to human body and environment because it is not closed operation
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[0032] The sample pretreatment device proposed by the present invention includes: a solvent pump and a solid-phase extraction device. The solvent pump can quantitatively output solvent, one end of which is connected to the sampling end of the solid-phase extraction device, and the other end is connected to the multi-channel sampling port. The selection valve is connected, and the multi-way sampling selection valve is connected with the test sample storage device or a variety of solvent storage devices; the collection end of the solid phase extraction device is connected with the multi-way collection selection valve, and the multi-way The collection selection valve is connected to the component collector; the solid-phase extraction device has a plurality of extraction columns that can be connected in series in sequence, and each of the two ends of the extraction column is respectively equipped with a A two-way reversing valve that connects or disconnects the collection end.
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The invention relates to a sample pretreatment device and a sample treatment method. The sample pretreatment device comprises a solvent pump and a solid-phase extraction device, wherein one end of the solvent pump is connected with the sample introduction end of the solid-phase extraction device, the other end of the solvent pump is connected with a multi-way sample introduction selection valve, and the multi-way sample introduction selection valve is connected with a test sample storage device or a multi-solvent storage device; the collecting end of the solid-phase extraction device is connected with a multi-way collection selection valve, and the multi-way collection selection valve is connected with a component collector; and the solid-phase extraction device is provided with a plurality of extraction columns which can be sequentially communicated in series, and two ends of each extraction column are respectively provided with a two-way reversing valve capable of connecting or disconnecting the extraction column with the sample introduction end and the collecting end. By using the sample pretreatment device provided by the invention, the manual treatment of samples in a laboratory is simplified, influences brought by the environment are minimized, and the sample pretreatment time is shortened.
Description
technical field [0001] The invention relates to a sample extraction and purification pretreatment system and treatment method, especially a sample pretreatment device and treatment method capable of extracting and purifying dioxins and polychlorinated biphenyls in samples, which can replace manual extraction and purification. The purification process realizes automatic selection and addition of solvents, and a sample pretreatment device for automatic collection. Background technique [0002] Dioxins, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, and pesticide residues are environmental trace pollutants that have received widespread attention in recent years, and belong to persistent organic pollutants (Persistent Organic Pollutants, POPs). For the detection of dioxin and polychlorinated biphenyl persistent organic pollutants, since their environmental content is generally below the pg (1pg=10-12g) level or below the PPT (10-12) level, the pretreatment method i...
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IPC IPC(8): G01N1/28G01N1/34
Inventor 田莉娟李东旭王洪凯
Owner BEIJING POLYTECH INSTR