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Sample injection device of chromatographic online analysis system and method of using same to process sample

A technology of an analysis system and a sampling device, which is applied in the field of sampling devices of a chromatographic online analysis system, can solve the problems of sample residue, inability to realize freezing enrichment and heating transmission at the same time, uneven temperature control, etc. The effect of uniform heat preservation and improved precision

Inactive Publication Date: 2017-11-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the existing chromatographic on-line analysis system needs to be improved to solve the problem of sample residue caused by uneven temperature control and the defect that freezing enrichment and heating transmission cannot be realized at the same time

Method used

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  • Sample injection device of chromatographic online analysis system and method of using same to process sample
  • Sample injection device of chromatographic online analysis system and method of using same to process sample
  • Sample injection device of chromatographic online analysis system and method of using same to process sample

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Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the sampling device is used to connect the sample to be tested with the chromatograph, and includes a sampling pipeline 11 , a thermocouple 12 , a controller 13 and a DC power supply 14 .

[0029] Specifically, the sampling pipeline 11 is respectively connected to the sample to be tested (such as a sample cell, etc.) and a chromatograph (such as a capillary chromatographic column, etc.), and is a channel for transporting the substance to be tested. The sampling pipeline is a linear tubular passage, and the transmission of compounds with different boiling points is ensured by directly heating the tubular passage during the process of transporting the sample to be tested.

[0030] The sampling pipeline 11 is made of a uniform metal material (such as stainless steel), which can conduct electric current, and because the sampling pipeline 11 itself has a certain resistance, after it is connected into the current loop, the sampling pipeline 11 will ...

Embodiment 2

[0039] In this embodiment, the direct current power supply 14 is used to form a current loop in any part of the sample injection pipeline 11, thereby achieving segmental heating of the sample to be tested.

[0040] Such as figure 2 As shown, a pair of input ends and output ends of a DC power supply are also provided between the sample inlet and the sample outlet of the sample injection pipeline 11 . If the input end of the DC power supply has been set at the injection port of the sampling pipeline 11, the input end and the output end of the DC power supply between the injection port and the sample outlet form a current loop, and the The input end of the DC power supply between the mouth and the sample outlet and the output end of the DC power supply at the sample outlet of the sampling pipeline 11 constitute another current loop, so that two loops are formed on the entire sampling pipeline 11. current loop.

[0041] Furthermore, if a plurality of DC power supplies with the sa...

Embodiment 3

[0045] In this embodiment, the enrichment of the sample to be tested is achieved by changing the local shape of the sampling pipeline.

[0046] Such as image 3 As shown, a section of the sampling pipeline 11 has a U-shaped bend structure, and a cooling unit 31 is also provided corresponding to the U-shaped curved pipeline.

[0047] The cooling unit 31 is connected to the controller 13, and under the instruction control of the controller 13, the cooling unit 31 is loaded onto the U-shaped curved sampling pipeline, or the cooling unit 31 is removed from the U-shaped curved sampling pipeline. uninstall. The substance to be tested can be frozen and enriched at the U-shaped curved sampling pipeline, and then vaporized through the heating pipeline and enter the chromatograph to complete the analysis.

[0048] Specifically, before the heating current is applied, the cooling unit 31 is first connected to the U-shaped bending area, substances with different boiling points can be enr...

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Abstract

The invention discloses a sampling device of a chromatographic on-line analysis system and a method for processing samples by using the same. The device includes a sampling pipeline, a tubular passage connecting the sample to be tested and a chromatograph, and the device is used during the process of transporting the sample to be tested. It is directly heated and / or cooled to realize the processing of the sample to be tested; the thermocouple is connected with the sampling pipeline and the controller, and is used to measure the temperature of the sampling pipeline; the controller, according to the substance of the sample to be tested The transmission requirement and the measured temperature value of the sample injection pipeline control the temperature adjustment of the sample injection pipeline. The device ensures the enrichment and rapid release of substances with different molecular weights, and at the same time, the heat preservation of the pipeline is uniform, which avoids the residue of the substance to be tested before entering the chromatograph, and improves the detection accuracy.

Description

technical field [0001] The invention belongs to the field of component analysis of geological samples, and in particular relates to a sampling device of a chromatographic on-line analysis system and a method for processing samples by using the same. Background technique [0002] Chromatographic analysis method is an efficient chemical analysis method, which has been widely used in the composition analysis of geological samples. For some samples that cannot be pre-treated for substance preparation, it is necessary to transfer the substance to be tested to the chromatograph through a pipeline, which is called online analysis. [0003] In the existing chromatographic on-line analysis systems and analysis methods, the heating wire coiled transmission line is generally used for heat conduction to achieve the effect of heating, and an insulation layer is added at the same time, such as the Pyroprobe series products of the American CDS company. The main problem is that, on the one...

Claims

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Application Information

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IPC IPC(8): G01N30/30G01N30/16
CPCG01N30/30G01N30/16G01N2030/3023G01N2030/3053
Inventor 张志荣秦建中刘伟新陶国亮
Owner CHINA PETROLEUM & CHEM CORP
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