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Bundling capillary pipe solid phase micro-extraction device

A technology of clustered capillary tubes and extraction devices, which is applied in solid solvent extraction, ion exchange treatment devices, ion exchange regeneration, etc., can solve the problems of not being able to meet the rapid analysis of samples and limit the amount of sample processing, so as to shorten the pretreatment time and increase the extraction The effect of simple surface area and device structure

Active Publication Date: 2011-05-18
BEIJING PURKINJE GENERAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether it is fiber solid phase microextraction (Fiber-SPME), in-tube solid phase microextraction (In-Tube SPME) or adsorption stirring bar (SBSE), the extraction time needs to be more than 15min, which seriously limits the processing of samples per unit time. Quantity, can not meet the purpose of rapid analysis of samples

Method used

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  • Bundling capillary pipe solid phase micro-extraction device
  • Bundling capillary pipe solid phase micro-extraction device
  • Bundling capillary pipe solid phase micro-extraction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The cluster capillary solid-phase microextractor uses a quartz liner with an outer diameter of 6 mm and an inner diameter of 4 mm. The inner diameter of the closing port 103 is 2.5 mm. The capillary 101 is a glass tube with a length of 33 mm, an inner diameter of 0.5 mm and an outer diameter of 0.8 mm. The inner and outer surfaces of the liner 101 and the inner surface of the liner 102 are coated with polydimethylsiloxane extraction stationary phase and made cross-linked. The specific manufacturing method of the cluster capillary solid-phase microextractor is as follows:

[0028] (1) Cut off a plurality of capillary tubes 101 , wash and dry the surface for later use.

[0029] (2) The liner 102 is cleaned and dried for later use.

[0030] (3) Put a stainless steel mesh of a suitable size into the closing part 103 of the liner 102, and then put the capillary 101 into the drain.

[0031] (4) Dissolve the extraction stationary phase with cross-linking agent in a suitable ...

Embodiment 2

[0036] The bundled capillary solid-phase microextractor uses a quartz liner with an outer diameter of 6 mm and an inner diameter of 4 mm. The inner diameter of the closing port 103 is 2 mm. The capillary 101 is a quartz tube with a length of 25 mm, an inner diameter of 0.53 mm and an outer diameter of 0.7 mm. The inner and outer surfaces and the inner surface of the liner 102 are coated with polydimethylsiloxane extraction stationary phase and made cross-linked. The preparation method of extractor is with embodiment 1.

[0037] Prepare a water standard sample of n-alkane with a concentration of 20 μg / L, 100 mL, put it into a 100 mL glass syringe, assemble as shown in Figure 2B, and pass the water sample through the extractor. Using a Varian CP3800 gas chromatograph, the thermal analysis conditions are the same as in Example 1. The analysis conditions are: inlet temperature 260°C; FID detector temperature 300°C; Kefen brand 30m×0.53mm i.d.×0.6μm OV-1 chromatographic column (Da...

Embodiment 3

[0039]The cluster capillary solid-phase microextractor uses a stainless steel liner, the inner surface of which has been deposited by silica, with an outer diameter of 6.37 mm, an inner diameter of 4 mm, and an inner diameter of 2 mm at the end 103. The capillary 101 is 40 mm in length, 0.28 mm in inner diameter, and The 0.45mm deactivated stainless steel tube is coated with polydimethylsiloxane extraction stationary phase on the inner and outer surfaces of the capillary 101 and the inner surface of the liner 102, and made it cross-linked. The preparation method of extractor is with embodiment 1.

[0040] Six polycyclic aromatic hydrocarbons, naphthalene, acenaphthene, fluorene, phenanthrene, anthracene, and fluoranthene, were used to prepare 250 mL of each standard sample containing 20 μg / L water, extracted by cluster capillary extractor, and analyzed by thermal analysis. The analysis temperature is 270° C., the analysis time is 5 minutes, and other conditions are the same as...

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Abstract

The invention relates to a novel quick solid-phase micro-extraction device, which is formed by embedding a bunched capillary tube into a liner tube, wherein an extract solid phase is coated and crossed or bonded on inner surfaces and outer surfaces of capillary tubes and the inner surface of the liner tube, and various capillary tubes and the capillary tubes and the liner tube are integrated intoa whole through the crosslinked action of the extract solid phase so as to guarantee that the bunched capillary tube is fixed on a mouth position of the liner tube. Under the condition of extraction,a sample substrate passes through the bunched capillary tube, organic compositions in a sample are extracted and enriched to the solid phase, and extracted target compositions are separated out by a thermal desorption method. The novel quick solid-phase micro-extraction device adopts the bunched capillary tube of which the surface is coated with the extract solid phase to realize quick extractionand enrichment of micro and trace organic pollutant in the environmental water sample, is suitable for quickly extracting the organic pollutant in the water, can be combined with separation and analysis instruments such as a gas-phase chromatographic instrument and a chromatograph-mass spectrometer for use, and solves the problem of pretreatment of the sample during quick analysis of the organic pollutant in the water.

Description

technical field [0001] The invention relates to a fast solid-phase microextraction device, which belongs to the technical field of sample pretreatment. Specifically, the bundled capillary tube coated with extraction stationary phase is used as the extractor to quickly extract the organic pollutants in the water, and then it can be thermally decomposed on a special thermal analyzer or eluted with a small amount of organic solvent. The desorbed target components enter the analytical instrument for further analysis. Due to the extremely small resistance of the array bundled capillary and the large extraction surface area, the pretreatment time of water samples is greatly shortened. Background technique [0002] The traditional pretreatment techniques for liquid samples include liquid-liquid extraction (LLE), solid-phase extraction (SPE) and solid-phase microextraction (SPME). LLE and SPE techniques have disadvantages such as long sample processing time and the use of toxic org...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/08B01D11/02
Inventor 关亚风姚桂燕许峰观文娜王华
Owner BEIJING PURKINJE GENERAL INSTR