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Basic structure of gas chromatograph
The basic structure of a gas chromatograph consists of two parts, an analysis unit and a display unit. The former mainly includes gas source and control device, sample device thermostat and column. The latter mainly includes the detector and the automatic recorder. Columns (including stationary phase) and calibrators are the core components of a gas chromatograph.
(1) The gas path in the gas carrier gas chromatograph is a closed circuit system in which the carrier gas continuously operates. The entire carrier gas system requires the carrier gas to be pure, tightly closed, stable in flow velocity, and accurate in flow rate measurement.
(2) Injection system The sample injection is to add the gas or liquid sample to the upper end of the column at a constant and quantitative rate.
(3) Separation system The core of the separation system is the column. Its role is to separate the multi-component sample into individual components. Columns are divided into packed and capillary columns.
(4) The detection system The role of the detector is to convert the components of the sample separated by the column into electrical signals according to their characteristics and contents. After amplification, they are recorded by the recorder as chromatograms.
(5) Signal recording or microcomputer data processing systems In recent years, chromatographic data processors have mainly been used in gas chromatographs. Chromatographic data processors can print the recorded chromatograms and print out the processed results on the same recording paper, such as retention time, measured component mass fraction, and more.
(6) The temperature control system is used to control and measure the temperature of the column, detector, and gasification chamber and is an important part of the gas chromatograph. Gas chromatograph is divided into two categories: one is gas-solid chromatograph, and the other is gas-liquid chromatograph. The two types of chromatographs have different stationary phases, but the structure of the instrument is universal.
Main performance features:
1. High performance to price ratio, complete dual gas circuit design: Three detectors, FID, TCD, FPD or FID, TCD, and ECD can be installed at the same time. The instrument can be installed with one packed column and one capillary column at the same time. The amplifier and other types are optional. Five detectors and methane reformer optional, ceramic or quartz nozzles are optional.
2. Take the computer system, Chinese large-screen display, five-step upgrade.
3. Six-way temperature turbidity automatic alarm and automatic gas outage protection function.
4. The detector adopts unitized design, featuring high sensitivity, low noise, good repeatability and wide linear range.
5 can be configured with a variety of caliber packed column, column head injection, liner lining, capillary split / splitless injection.
6. The injection port has advanced sampling guides. The glass linings of various caliber capillaries are equipped with special springs to automatically find the balance position.
The basic structure of a gas chromatograph consists of two parts, an analysis unit and a display unit. The former mainly includes gas source and control device, sample device thermostat and column. The latter mainly includes the detector and the automatic recorder. Columns (including stationary phase) and calibrators are the core components of a gas chromatograph.
(1) The gas path in the gas carrier gas chromatograph is a closed circuit system in which the carrier gas continuously operates. The entire carrier gas system requires the carrier gas to be pure, tightly closed, stable in flow velocity, and accurate in flow rate measurement.
(2) Injection system The sample injection is to add the gas or liquid sample to the upper end of the column at a constant and quantitative rate.
(3) Separation system The core of the separation system is the column. Its role is to separate the multi-component sample into individual components. Columns are divided into packed and capillary columns.
(4) The detection system The role of the detector is to convert the components of the sample separated by the column into electrical signals according to their characteristics and contents. After amplification, they are recorded by the recorder as chromatograms.
(5) Signal recording or microcomputer data processing systems In recent years, chromatographic data processors have mainly been used in gas chromatographs. Chromatographic data processors can print the recorded chromatograms and print out the processed results on the same recording paper, such as retention time, measured component mass fraction, and more.
(6) The temperature control system is used to control and measure the temperature of the column, detector, and gasification chamber and is an important part of the gas chromatograph. Gas chromatograph is divided into two categories: one is gas-solid chromatograph, and the other is gas-liquid chromatograph. The two types of chromatographs have different stationary phases, but the structure of the instrument is universal.
Main performance features:
1. High performance to price ratio, complete dual gas circuit design: Three detectors, FID, TCD, FPD or FID, TCD, and ECD can be installed at the same time. The instrument can be installed with one packed column and one capillary column at the same time. The amplifier and other types are optional. Five detectors and methane reformer optional, ceramic or quartz nozzles are optional.
2. Take the computer system, Chinese large-screen display, five-step upgrade.
3. Six-way temperature turbidity automatic alarm and automatic gas outage protection function.
4. The detector adopts unitized design, featuring high sensitivity, low noise, good repeatability and wide linear range.
5 can be configured with a variety of caliber packed column, column head injection, liner lining, capillary split / splitless injection.
6. The injection port has advanced sampling guides. The glass linings of various caliber capillaries are equipped with special springs to automatically find the balance position.
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