Meteorological chromatograph is a commonly used
The analysis is mainly applied to the detection of components in various mixed gases, and is widely used in petroleum, chemical, biochemical, medical and health fields. The meteorological chromatograph consists of those components? The following small series will be introduced in detail, I hope to help everyone.
instrument
Gas Chromatograph
Basic structure 
The basic structure of a gas chromatograph has two parts, the analysis unit and
Display unit
. The former mainly includes gas source and control metering device, sample introduction device, thermostat and column. The latter mainly consists of a calibrator and an automatic recorder. The column (including the stationary phase) and the calibrator are the core components of the gas chromatograph.
(1) The gas path in the gas chromatograph of the carrier gas system is a closed piping system in which the carrier gas continuously operates. The entire carrier gas system requires pure carrier gas, good airtightness, stable flow rate and accurate flow rate measurement.
(2) Injection system injection is to apply a gas or liquid sample to the upper end of the column at a constant rate and quantitatively.
(3) Separation system The core of the separation system is a column, which functions to separate multi-component samples into individual components. The column is divided into two types: packed column and capillary column.
(4) Detection system The function of the detector is to convert the sample components separated by the column into electrical signals according to their characteristics and contents, and after amplification, record them into a chromatogram by a recorder.
(5) Signal recording or microcomputer data processing system In recent years, gas chromatographs mainly use chromatographic data processors. The chromatographic data processor prints the recorded chromatogram and prints the processed results on the same sheet of paper, such as retention time, mass fraction of the component being tested, and so on.
(6) Temperature
Control System
It is used to control and measure the temperature of the column, detector and gasification chamber. It is an important part of the gas chromatograph. Gas chromatographs fall into two categories: one is a gas-solid chromatograph and the other is a gas-liquid partition chromatograph. The stationary phases separated by these two types of chromatographs are different, but
instrument
The structure is universal.
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