Rapid heating gas chromatograph column box

Abstract

The invention discloses a rapid heating gas chromatograph column box, and relates to the technical field of gas chromatographs. The key points of the technical scheme are as follows: the box comprisesa box body and a chromatographic column arranged in the box body, wherein an inner heating wire and an outer heating wire are also arranged in the box body, the inner heating wire, the outer heatingwire and the chromatographic column are all bent into a spiral shape, and spirals formed by the inner heating wire, the outer heating wire and the chromatographic column are coaxial; the chromatographic column is located in a spiral cavity formed by the outer heating wire, and an outer gap is left between the outer heating wire and the chromatographic column; the inner heating wire is located in aspiral cavity formed by the chromatographic column, an inner gap is left between the inner heating wire and the chromatographic column, and the outer heating wire and the inner heating wire are electrically connected with a power supply. A gas chromatograph can measure benzene series in the air and the chromatographic column in the column box is heated quickly and evenly, and detection can be started without waiting for a long time even if the column box is in a cold state; besides, the temperature of the chromatograph column can be accurately regulated and controlled.

Description

technical field [0001] The invention relates to the technical field of gas chromatographs, in particular to a fast-heating gas chromatograph column box. Background technique [0002] A gas chromatograph is an instrument for determining the components in a mixture. During the measurement, the analysis sample is vaporized in the inlet, and then carried into the chromatographic column by the carrier gas. According to the characteristics of different retention properties of each component in the mixture, the Each component is separated and introduced into a detector in sequence to obtain the detection signal of each component. According to the order of importing detectors, the components can be distinguished after comparison, and the content of each component can be calculated according to the peak height or peak area. The commonly used detectors include thermal conductivity detectors, flame ionization detectors, etc. In order to pass the sample gas through the column at a pred...

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Problems solved by technology

[0004] The column heating furnace is the column oven, but the heater of the existing column oven is biased at one end of the box, and a fan is needed to stir the heat in the box, the heating speed is slow, and the equipment needs to wait for a long time when it is in a cold state in order to detect

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