Five-position eight-way valve and chromatogram system based on five-position eight-way valve

Abstract

The invention provides a five-position eight-way valve and a chromatogram system based on the five-position eight-way valve, and relates to a flow path control valve and a chromatogram system or a liquid chromatogram system with a plurality of sample feeding patterns. The invention aims at providing the five-position eight-way valve which is simple and convenient to operate and has various functions, and the chromatogram system based on the five-position eight-way valve. The five-position eight-way valve comprises a valve element and a valve body, wherein eight connectors are formed in the valve body; three channels are formed in the valve element; and the valve element has five working stations in the valve body. The chromatogram system comprises a system pump, a sample feeding valve, a sample feeding ring, a chromatogram column, a detector and a sample pump, wherein the sample feeding valve is the five-position eight-way valve; five of the eight connectors in the valve body of the five-position eight-way valve are communicated with an outlet end of the system pump, the two ends of the sample feeding ring, an inlet end of the chromatogram column and an outlet end of the sample pump; one of the eight connectors is a connector for loading a sample injection device to the sample feeding ring; and two of the eight connectors are waste liquid discharging openings.

Description

technical field [0001] The invention relates to a flow path control valve and a system for separating materials into components by chromatography to prepare and purify or test and analyze materials, in particular to a five-position eight-way valve and a system with multiple A chromatography system or a liquid chromatography system in loading mode. Background technique [0002] At present, the chromatography system based on the three-position seven-way valve for sample loading can only realize the separate connection and loading of the sample loop (super sample cup) or the sample pump. like Figure 1a As shown, the existing chromatography system includes a system pump 1', a sample loading valve 2', a sample loading loop 3', a chromatography column 4' and a detector 5', and the sample loading valve 2' is a three-position seven-way valve. There are seven interfaces on the valve body of the sample loading valve 2', which are respectively interface 1 to interface 7. The system p...

AI Technical Summary

Problems solved by technology

If the amount of sample loaded is relatively large, we usually use the system pump or separately configure the sample pump to load the sample. The system pump generally loads the sample through the position A2 in the flow diagram. There are two shortcomings in the sample loading here: 1. , A2 is the buffer inlet, the buffer inlet is occupied and affects the convenience of buffer operation; 2. The system pump is expensive, and it is often used for sample loading and is easily contaminated, which reduces its life

The problem brought about by this mode of operation is: the sample loop and the sample pump can only be selected from one of the two. When the sample volume is small, the sample loop is connected, and when the sample volume is large, the sample pump is connected. If there are many experiments in a day, and If the sample size is different, it needs to be disassembled and connected continuously, which brings inconvenience and cumbersome operation, and also has an adverse effect on the life of the sample loading valve.

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