Sample extraction, purification and concentration integrated device and sample pretreatment method
A sample and extraction technology, applied in the field of purification and concentration integrated device, sample extraction, and sample pretreatment, can solve the problems of insufficient intelligent pressure control of the extraction device, heavy workload of operators, and no sample extraction system, etc. The effect of low equipment cost, improved evaporation efficiency and low equipment requirements
A sample and extraction technology, applied in the field of purification and concentration integrated device, sample extraction, and sample pretreatment, can solve the problems of insufficient intelligent pressure control of the extraction device, heavy workload of operators, and no sample extraction system, etc. The effect of low equipment cost, improved evaporation efficiency and low equipment requirements
CN104316381BInactive Publication Date: 2017-06-20RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0039] Such as figure 1 Shown is a schematic diagram of the integrated device for sample extraction, purification and concentration of the present invention.
[0040] The invention includes a solvent system, a sample extraction system, a sample purification system, a sample concentration system and a computer. in:
[0041] Solvent system: In this embodiment, four commonly used organic solvents, n-hexane, methylene chloride, toluene and acetone, are taken as examples. The solvent system is selected and distributed by the first solvent selection valve 1 and the first solvent switching valve 3. According to the needs of the system extraction or purification steps, the target solvent is drawn by the pump N; if a mixed solvent is required, a certain amount of solvent is drawn by the pump N Enter the premix bottle K for premixing and then transfer (solve...
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An integrated device for sample extraction, purification and concentration, including a solvent system, a sample extraction system, a sample purification system, a sample concentration system and a computer; wherein: the solvent system provides necessary solvents for the sample extraction and purification steps; the sample extraction system adopts advanced After pre-freezing the sample with liquid nitrogen, the method of organic solvent extraction is carried out. The extract is stored in the buffer pool and injected into the sample purification system by high-purity nitrogen. The sample purification system includes acid silica gel column, composite silica gel column, alumina column, Commercial packed columns such as activated carbon columns can be used for single-column and multi-column series purification; the sample concentration system uses the heat generated by resonance of nano-gold or nano-silver particles to evaporate and concentrate the sample solution, and the concentrated solution is transferred to the sample receiving bottle. Sample pretreatment process.
Description
technical field [0001] The invention relates to an instrument structure for automatic operation of extraction, purification and concentration of persistent organic pollutants in solid samples, more specifically, an integrated device for sample extraction, purification and concentration. [0002] The present invention also relates to a method for sample pretreatment using the above-mentioned device. Background technique [0003] Persistent organic pollutants (POPs) are a class of environmental pollutants that have received widespread attention in recent years. Such pollutants generally have strong environmental persistence, biological toxicity, bioaccumulation ability and long-distance migration ability, so the scientific issues related to them have become research hotspots in the field of environmental science. [0004] The content level of POPs in the environment is generally low, usually ppb~ppt level (10 -9 ~10 -12 ), which poses great challenges to instrumental analys...
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Patent Timeline
20 Jun 2017
Publication
CN104316381B
- IPC
- G01N1/28; G01N1/34; G01N1/40
- Inventors
- ηη; ζ±θΆ ι£