Solvent quenching accelerating device online co-operated with gas phase chromatography and method thereof

A technology for accelerating solvent and gas chromatography, applied in measurement devices, ion exchange processing devices, material separation, etc., can solve problems such as low sample utilization rate, inability to apply gas chromatography on-line analysis, etc., to improve detection sensitivity, simplify pretreatment, Sensitive effect

Active Publication Date: 2007-02-07
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the accelerated solvent extraction device of Diane Company is only a sample pretreatment technology, and the sample utilization rate is still very low, about 0.1% to 2%, and the amount of solvent used is still large, so it cannot be applied to gas chromatography on-line analysis

Method used

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  • Solvent quenching accelerating device online co-operated with gas phase chromatography and method thereof
  • Solvent quenching accelerating device online co-operated with gas phase chromatography and method thereof
  • Solvent quenching accelerating device online co-operated with gas phase chromatography and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as Figure 1A ~ Figure 1C Shown is a schematic diagram of the entire sampling device for accelerated solvent extraction coupled with gas chromatography. The solvent delivery high-pressure pump 102 is connected to the No. 1 position of the ten-way valve 106. The inlet pipe 201 and the outlet pipe 211 of the extraction tank 2 are respectively connected to the No. 10 and No. 3 positions of the ten-way valve 106 using stainless steel pipes with small inner diameters. The sensor 104 is connected to the No. 2 position of the ten-way valve 106, the two ends of the first metering tube 1051 are respectively connected to the No. 9 and No. 6 positions of the ten-way valve 106, and the No. 8 and No. 7 positions of the ten-way valve 106 They are respectively the inlet and the outlet for injecting the solution into the first measuring tube 1051, and No. 4 and No. 5 positions of the ten-way valve 106 are respectively connected with No. 1 and No. 4 positions of the six-way valve 1...

Embodiment 2

[0047] Such as Figure 2A ~ Figure 2C Shown is a schematic diagram of part of the sampling device for accelerated solvent extraction coupled with gas chromatography. The solvent delivery high-pressure pump 102 is connected to the No. 1 position of the ten-way valve 106, the inlet pipe 201 and the outlet pipe 211 of the extraction tank 2 are respectively connected to the No. 10 and No. 3 positions of the ten-way valve 106, and the pressure sensor 104 is connected to the ten-way valve. The No. 2 position of the valve 106, the two ends of the first metering tube 1051 are respectively connected to the No. 9 and No. 6 positions of the ten-way valve 106, and the No. 8 and No. 7 positions of the ten-way valve 106 are respectively for the first fixed position. The measuring tube 1051 is injected into the inlet and outlet of the solution, the first auxiliary carrier gas 1161 is connected to the 5th position of the ten-way valve 106 through the first steady flow valve 1071, the 4th posi...

Embodiment 3

[0060] The experimental device and method are the same as in Example 1, and the environmental pollutants in the soil are extracted with a pressurized solvent. The solvent is 1:1 n-hexane:acetone, the extraction pressure is 10 MPa, the extraction temperature is 100° C., and the extraction time is 10 minutes.

[0061] The accelerated solvent extraction device of the present invention is combined with a gas chromatograph, and the sample is pretreated and analyzed online with a gas chromatograph, and all or part of the extract flowing out of the accelerated solvent extraction device is transferred to a gas chromatograph for analysis, specifically The operation steps are: put the sample into the extraction cell body 204 in the extraction cell 2, seal it, and place the ten-way valve 106 at the solvent extraction position; use the solvent delivery high-pressure pump 102 to introduce the solvent into the extraction cell body 204 in the extraction cell 2 Pressurize at 5-20MPa, and heat...

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Abstract

The related extraction device applied with gas phase chromatogram on-line comprises: a small extraction pond, a heating unit, a ten-way valve, a six-way valve, a dosing tube, an assist carrier gas, a stead valve, a pressure sensor, a high-pressure pump for solvent, and a capillary transmission pipe. Compared with prior art, this invention improves sample utility up to 50-100 times with less solvent and high repeating precision, and has wide application.

Description

technical field [0001] The invention relates to an extraction device used in the pretreatment of analytical samples, in particular to an accelerated solvent extraction device used in conjunction with gas chromatography on-line. [0002] The invention also relates to a method for realizing the online combination of accelerated solvent extraction and gas chromatography. Background technique [0003] In analytical chemistry, methods for extracting solid and colloidal samples include Soxhlet extraction, ultrasonic extraction, microwave extraction, and accelerated solvent extraction. The simplest liquid-solid extraction is to put the solid to be extracted into the extraction solvent, shake it, and heat it if necessary, and then use centrifugation or filtration to separate the liquid and solid, and the components to be extracted enter the solvent. [0004] The most commonly used liquid-solid extraction is Soxhlet extraction, and its extraction device includes a condensing reflux ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06B01D15/08
Inventor 关亚风赵景红周延生刘文民徐媛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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