Coal mine gas chromatograph

GC-7900Coal mine gas chromatographIt is a cost-effective, multifunctional, economical and practical precision instrument. The instrument adopts a three column three gas path operating system, and the basic model is equipped with a hydrogen flame ionization detector (FID) and a thermal conductivity cell detector (TCD). The instrument can be equipped with automatic ignition and automatic bridge current function.

Coal mine gas chromatographPerformance characteristics:

1. Excellent column box performance, can achieve true near room temperature operation, can perform five step programmed heating, has column box automatic cooling and rear door opening function, fast cooling speed, and achieves rapid cooling.

2. It has six independent control areas: column box, capillary injector, packed column injector, detector, thermal conductivity cell, and auxiliary device.

3. The instrument is equipped with one capillary injection port and two packed column injection ports, which can simultaneously accommodate two gas path systems: packed column and capillary column. It can meet the current requirements for the selection and analysis of various chromatographic columns in chromatographic analysis.

4. The instrument has a dual gas path, triple injector, and dual packed column system structure, which can effectively suppress baseline fluctuations and drift in real time and is suitable for programmed temperature analysis.

5. The keyboard is used to set various control and usage parameters (including detector operation parameters), and the machine has functions such as self diagnosis, power-off protection, file storage and retrieval, and extreme temperature setting. It can display various temperature control settings, actual values, TCD bridge current, FID amplifier sensitivity, retention and analysis time, etc.

6. Multiple detector combinations can be selected according to usage requirements: FID, TCD, FPD, ECD, NPD, etc.

7. Adopting LCD display, the display content is rich, intuitive, and easy to operate.

8. Selecting domestic and foreign electrical components and carefully selecting them, along with calibrated pneumatic control valves, ensures the reliability, stability, and high sensitivity of the instrument.

Main technical indicators:

◆ Temperature control:

Temperature control range: 6 ℃ -400 ℃ at room temperature

Temperature control accuracy: Soil 0.01 ℃

Temperature control channels: 5 channels (expandable to 6 channels)

Program heating order: 5 orders

Cheng Sheng rate: 0.1 ℃ -50 ℃/min

Time setting: 0-9999.9/min

Flame ionization detector (FID): (n-hexadecane)

Detection limit: Mt ≤ 5 × 10-12g/s

Baseline noise: ≤ 6 × 10-14A

Baseline drift: ≤ 6 × 10-13A/h

Linear range: ≥ 106

Thermal conductivity detector (TCD): (n-hexadecane)

Sensitivity: S ≥ 5000mv.ml/mg

Baseline noise: ≤ 20UV

Baseline drift: ≤ 30UV/h

Linear range: ≥ 104