1. Recommended features of domestic gas chromatographs:

1. Carrier gas rotor flowmeter 2, large capacity column box 3, power switch 4, circuit control panel 5, detector 6, vaporization chamber 7, gas stabilizing valve/pressure gauge

GC2010 modelThe gas chromatograph [basic structure shown in Figure 1-1] is a universal, multi-purpose, high-performance single detector series instrument. The basic instrument adopts a dual gas path analysis system, equipped with a hydrogen flame detector [FID], and can be operated in a constant temperature or programmed temperature mode; Can install packed columns or capillary chromatography columns; Can be used for column head injection or rapid vaporization injection analysis; And various detectors with different performance can be selected and configured, such as TCD, ECD, FPD, NPD, etc., to form instruments with different performance, meeting the needs of different users, analysis objects, and application scenarios. The instrument is controlled by a microcomputer, operated by a keyboard, and displayed on a LCD screen. It has the advantages of high electronic circuit integration, good reliability, simple operation, and adaptability to long-term operation. The column box is equipped with a rear opening automatic cooling system, and each heating zone (such as the injector constant temperature box, capillary injector constant temperature box, detector constant temperature box, auxiliary constant temperature box, and column constant temperature box) is relatively separated by insulation materials to minimize heat transfer between each heating zone. The temperature of each heating zone can be independently controlled. The constant temperature chamber of the injector can accommodate two packed column injectors or rapid vaporization injectors simultaneously. One capillary injector can be installed inside the capillary injector box. To meet the needs of special users, the instrument can be equipped with two detector boxes simultaneously. One standard detector box and one thermal conductivity cell detector box. The standard detector box adopts a dual seat installation method, which can simultaneously install two detectors. The flow rate and pressure controller system of the basic instrument gas are installed inside the instrument gas circuit box. The injection system installed on the top of the instrument requires a vertical injection method, and the instrument can be equipped with an automatic injection system.

Instrument technical specifications
2.1 Comprehensive parameters
External dimensions: 555×490×480[mm ]； (Length x Height x Width).
Column box size: 260×250×150[mm ]； (Length x Height x Depth).
Column installation interval size: 152.4mm; (6-inch standard interface).
Chromatography column: outer diameter of packed column is between 3 and 5mm; (Metal or glass pillar).
Instrument weight: 45Kg
2.2 Temperature control
Column box temperature control:
Add 8 ℃ to 350 ℃ at room temperature; (set in increments of 1 ℃) (indicator parameters),
(The upper limit of the set parameters can reach 399 ℃, which is valid and can be used by users, but the technical specifications are not guaranteed).
Temperature fluctuation: not greater than ± 0.1 ℃; (Environmental temperature changes by 10 ℃ or power supply voltage changes by 10%).
Temperature gradient: ± 1% (temperature range 100 ℃~350 ℃).
TPD
Program order: 5 orders.
Heating rate: 0.1-30 ℃/min (set in increments of 0.1 ℃).
Cooling rate: The time for the temperature of the column box to drop from 200 ℃ to 100 ℃ shall not exceed 3 minutes.
Time setting: 9999.9 (min).
Thermal conductivity detector temperature control
Add 20 ℃ to 350 ℃ at room temperature (index parameters).
(The upper limit of the set parameters can reach 399 ℃, which is valid and can be used by users, but the technical specifications are not guaranteed).
Temperature control accuracy: not greater than ± 0.1 ℃.
Other heating zone temperatures:
Add 20 ℃ to 350 ℃ at room temperature (index parameters).
(The upper limit of the set parameters can reach 399 ℃, which is valid and can be used by users, but the technical specifications are not guaranteed).

3
Temperature control accuracy: not greater than ± 0.2 ℃.
2.3 FID detector
Detection limit: not greater than 2 × 10-11g/s [n-C16].
Noise: 2 × 10-13A [not greater than 0.02mV].
Drift: not greater than 4 × 10-12A/h.
Start time: no more than 1.5 hours.
2.4 Application Environment
Environmental temperature: 5 ℃ to 35 ℃.
Relative humidity: not exceeding 85%.
Supply voltage: 220 ± 22V.
Power supply frequency: 50 ± 0.5Hz.
Maximum power consumption: 2500W.
There should be no corrosive gases indoors, the workbench should not have strong mechanical vibrations, and there should be no strong electromagnetic field interference around it
There is no drastic change in internal temperature, and there is no significant convection in the air.