Multi-component detection system based on single column

A detection system and multi-component technology, applied in the field of chromatography, can solve the problems of complicated valves, chromatographic columns and gas paths, complicated double-valve and double-column gas paths, unfavorable installation and maintenance, etc., and achieves reduced maintenance, simple structure and low cost. Effect

Pending Publication Date: 2021-01-22
HANGZHOU PUYU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The gas path of double valve and double column is complex, and the space of the valve box is crowded, which is not conducive to installation and maintenance;
[0004] 2. Double valve and double column, choose double valve, high cost
[

Method used

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  • Multi-component detection system based on single column
  • Multi-component detection system based on single column
  • Multi-component detection system based on single column

Examples

Experimental program
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Effect test

Embodiment 1

[0029] figure 1 Schematically presents a simplified structural diagram of a multi-component detection system based on a single column in an embodiment of the present invention, as shown in figure 1 As shown, the multi-component detection system based on single column comprises:

[0030] Quantitative loop 81, there is only one multi-way valve 71 directly connected with only one quantitative loop 81;

[0031] A multi-way valve 71, the two ends of the quantitative loop 81 are respectively connected to the ports of the multi-way valve 71;

[0032] Sample gas inlet 41, calibration gas inlet 42, carrier gas inlet 43, hydrogen inlet 44, oxygen inlet 45 and calibration gas outlet 46, filters are arranged downstream of each gas inlet;

[0033] A chromatographic column 61, the two ends of the only one chromatographic column 61 are respectively connected to the port of the multi-way valve 71;

[0034] figure 1 Schematically provides the structural diagram of the chromatographic colum...

Embodiment 2

[0042] An application example of the single-column-based multi-component detection system in the detection of non-methane total hydrocarbons according to Embodiment 1 of the present invention.

[0043] In this application example, if figure 1 As shown, the only one multi-way valve, the only quantitative loop and the gas circuit adopt the existing technology;

[0044] Such as figure 2 As shown, the chromatographic column in this application example adopts a dual-channel concentric composite chromatographic column. The center is the first channel, which is an inertized empty column for separating total hydrocarbons; To separate methane; the cross section of the first channel perpendicular to the direction of its internal fluid flow velocity is circular, the cross section of the second channel perpendicular to the direction of its internal fluid flow velocity is circular, the output of the first channel and the second channel The air resistance of the cylindrical structure is ...

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Abstract

The invention provides a multi-component detection system based on a single column. The multi-component detection system comprises a quantification unit, wherein two ends of the quantification unit are respectively communicated with ports of a multi-way valve, two ends of only one chromatographic column are respectively communicated with the ports of the multi-way valve, and the chromatographic column comprises: a plurality of channels arranged in parallel, a stationary phase arranged in the channels, and gas resistors arranged at the output ends of the channels, so that the pressure intensityof the input ends of the plurality of channels is the same when to-be-detected gas is introduced into the plurality of channels. The multi-component detection system has the advantages of being simple in structure, low in cost, short in separation time, capable of separating multiple components simultaneously, good in separation effect and the like.

Description

technical field [0001] The invention relates to chromatographic technology, in particular to a multi-component detection system based on a single column. Background technique [0002] Chromatography is a commonly used high-end precision analytical instrument. In the chromatographic instrument, the chromatographic column is a key device used to separate substances. The chromatographic columns with different physical and chemical properties have limited separation capabilities for different substances. Therefore, traditional chromatographic instruments often use multi-valve and multi-column parallel backflush chromatography for separation when analyzing multiple substances. Technology: Multiple multiport valves are distributed with columns. Taking the non-methane total hydrocarbon gas chromatograph as an example, the principle schematic diagram of the chromatograph is shown in Figure 1. The methane and total hydrocarbons are analyzed separately by using two valves and two chr...

Claims

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Application Information

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IPC IPC(8): G01N30/20G01N30/60
CPCG01N30/20G01N30/6052G01N2030/201
Inventor 田智林徐蕾陈斌李天麟王琳琳刘立鹏
Owner HANGZHOU PUYU TECH DEV CO LTD
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