GC-9890A Chromatograph Model
* Key Features
The main unit is equipped with a two-way valve control system, facilitating online automatic sampling.
2. The inter-column compensation circuit provides electronic compensation for baseline drift during program heating, reducing the complexity introduced by the column, detector, and auxiliary flow system.
3. The signal from the detector, the value from the heater, the furnace temperature, the flow sensor reading, or the signal from the stored column compensation baseline can all be assigned to a simulated output channel.
4. Self-diagnostic testing and fault diagnosis, power-off protected stored experimental data, stopwatch and operation timer, keyboard lock function.
5. Type A does not support reverse control software or EPC functions.
6. Compatible with the U.S. HP-5890 Gas Chromatograph Microbial Conductivity Detector for easy integration.
7. Capable of installing two flow sensor channels, two single-column compensation channels.
Heating Furnace System
Temperature Range: +5℃ to 400℃ ambient temperature
Three-stage program heating, heating rate 0～50℃/min; increment 0.1℃/min. Temperature control accuracy ±0.05℃。
Users can recalibrate the furnace temperature and set the required temperature.
The intelligent rear door system features stepless adjustable air volume, reducing the time to stabilize and balance after heating/cooling. The column cabinet can drop from 300℃ to 50℃ in less than 15 minutes.
Sample Submission System
1. Filling Column Sampler: Suitable for various inner diameters of filling columns and large-bore capillary columns.
2. Capillary Sample Injector: Optional with分流/不分流sample injection system controlled by a programmable valve.
3. Optional: Shanghai Hesta's headspace sampler and thermal desorption instrument.
Detector System
Hydrogen Flame Ionization Detector (FID)
Easy to dismantle and install, convenient for cleaning or replacing nozzles; simple operation; input signals can be logarithmically amplified, reducing interference, with high sensitivity, good linearity, and wide range.
Sensitivity: Mt ≤ 5×10^-12 g/s (n-hexadecane)
Baseline Noise: ≤ 6×10^-12 A/H
Linear Range: ≥105
Stable Time: ＜ 0.5h
2. Thermal Conductivity Detector (TCD)
Sensitivity: Type A: ≥3000 mv?ml/mg (n-hexadecane)
B Type: ≥5000 mv?ml/mg (N-Heptane)
C-type (Micro-pool Amplification): ≥10000 mv?ml/mg (n-hexadecane)
Baseline Noise: ≤30μv (with 99.999% helium as the carrier gas)
Stable Time: Type C < 15min
