Gas chromatography sample introduction device capable of realizing self cleaning of flow distribution pipeline

A gas chromatography and sampling device technology, applied in the field of analytical instruments, can solve the problems of cleanliness affecting analytical precision, expensive, time-consuming, etc., and achieves the effect of avoiding the procedure of the sampling port, improving the service life and making the manufacturing process simple.
CN107589207APending Publication Date: 2018-01-16EAST CHINA NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
EAST CHINA NORMAL UNIV
Publication Date
2018-01-16

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Abstract

The invention discloses a gas chromatography sample introduction device capable of realizing self cleaning of a flow distribution pipeline. The gas chromatography sample introduction device comprisesa diverter, a gas chromatograph control unit, a constant temperature heating belt, a temperature controller, a three-way stop valve, a flow distribution pipeline outlet, and a washing gas outlet. According to the gas chromatography sample introduction device, the three-way stop valve is arranged on the flow distribution pipeline of the diverter, the external surfaces of the flow distribution pipeline and the three way stop valve are sleeved with the constant temperature heating belt, the gas chromatograph control unit is used for controlling the three-way stop valve and the constant temperature heating belt respectively, control commands are written on the gas chromatograph control unit, and self cleaning of the flow distribution pipeline is completed. The gas chromatography sample introduction device is capable of ensuring apparatus analysis precision, prolonging apparatus service life, is simple in production technology, is capable of realizing convenient self cleaning, and is low incost.
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Description

technical field

[0001] The invention relates to a gas chromatographic sampling device in the technical field of analytical instruments, in particular to a gas chromatographic sampling device for self-cleaning split pipes. Background technique

[0002] The main difference between the sampling device of the gas chromatograph is that the split port is set or not. Since the gas chromatograph is a high-sensitivity analysis instrument, in addition to directly detecting constant components in the environment, soil, water resources or food, the split mode is also The main application mode is that in the split flow mode, most of the samples flow out from the split flow port. The split flow port of the gas chromatography sampling device in the prior art is at normal temperature. Some components with high boiling points will stay in the pipe of the split port. After staying to a certain extent, the pipe of the split port may be blocked. At the same time, a small amount of components wi...

Claims

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