Multi-component detection system based on single column

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...

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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

[0005] Based on the above principles, when there are more types of analytes, such as simultaneous analysis of methane, total hydrocarbons and benzene series, the required valves, chromatographic columns and gas paths will be more complicated

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