GC-9890A "AA" test gas chromatograph

* Main features
1. The host comes with a two-way valve control system, which facilitates online automatic sampling.
2. The inter column compensation circuit electronically compensates for baseline drift during program temperature rise, reducing the complexity caused by the second column, detector, and auxiliary flow system.
3. The signals from the detector, heater values, furnace temperature, flow sensor readings, or stored column compensation baseline signals can all be assigned to a simulated output channel.
4. Self testing and fault diagnosis, experimental data stored for power-off protection, stopwatch and running timer, keyboard locking function.

5. Can be connected to reverse control workstations (B-type, E-type) to achieve real-time control, and can store 100 sets of experimental conditions and spectra.

6. Can install two flow sensing channels and two single column compensation channels.

Heating furnace system
Temperature range: ambient temperature+5 ℃~400 ℃
Third order programmed heating, with a heating rate of 0-50 ℃/min; Incremental 0.1 ℃/min.

Temperature control accuracy ± 0.05 ℃,
Users can recalibrate the furnace temperature and set the desired temperature.
The intelligent rear door opening system has stepless variable air flow in and out, which shortens the stable balance time of the system after heating/cooling. The time taken for the column box to drop from 300 ℃ to 50 ℃ is less than 15 minutes.

Sample injection system
Filler column sampler: suitable for various caliber filler columns and large-diameter capillary columns.

Detector system

Hydrogen flame ionization detector (FID):

Easy to disassemble and install, convenient for cleaning or replacing nozzles, simple to operate; The input signal can be logarithmic amplified, reducing interference, with high sensitivity, good linearity, and wide range.
Sensitivity: Mt ≤ 5 ×10^-12G/s (n-hexadecane)
Baseline noise: ≤ 6×10^-12A/H
Linear range: ≥10⁵
Stable time:< 0.5h

Headspace sampler

The headspace sampler is connected to the gas chromatograph through a dedicated interface, and all parameters can be inputted. After startup, complete tasks such as needle injection, pressure balancing, quantitative tube sampling, six way valve switching for sampling, and starting the workstation to start sampling and recording according to the set values.

Set parameter range

Time: Sample heating, pressure balance, injection 0-99min

Temperature: Sample heating, quantitative tube and pipeline insulation room temperature~220 ℃

Pressure: carrier gas balance 0-0.25Mpa