The GC-7900 gas chromatograph is a high-performance instrument newly produced by Shanghai Xuansheng Scientific Instrument Co., Ltd. The instrument has a stylish appearance and beautiful design; Adopting a 5.7-inch LCD display screen, the display content is rich and intuitive; The circuit adoptsIndependently developed multi CPU control technologyStable performance and strong scalability enable multidimensional chromatographic analysis. This instrument can be widely used for routine analysis of control and detection in power, environment, medicine, pesticides, petroleum, coal, commercial inspection, epidemic prevention, universities, scientific research, and chemical industry. It can also be modified into a dedicated chromatograph according to different user needs.
The machine adopts a modular design, with a compact and reasonable body structure, multiple expansion functions, and accurate and fast analysis.
Equipped with a 5.7 LCD screen, the display content is rich and intuitive, making human-machine dialogue easier. Chinese English switching mode to meet different customer needs.
Adopting advanced microcomputer control system, all control and analysis tasks can be completed on PC, and built-in AD conversion circuit can also be selected to directly output chromatographic signals digitally.
It has 6 control modules, and the temperature control of each module can be set from room temperature to 400 ℃, with an increment of 1 ℃ and an accuracy of ± 0.1 ℃
Equipped with over temperature protection, if each temperature control system exceeds the set temperature protection value, it will automatically power off to avoid danger caused by temperature loss of control.
Intelligent flexible rear door design, with more precise temperature control accuracy.
Equipped with 9-order programmed temperature rise, it meets the requirements for complex sample analysis.
Cheng Sheng rate: 0.1-40 ℃/min
Multiple injection methods to choose from: column head injection, split/non split injection, packed column injection, gas valve injection, headspace injection, thermal analysis injection, purge and flash injection, etc
A 20L large column temperature chamber lays the foundation for multidimensional chromatographic analysis.
The external control event module can be equipped with a multi valve and multi column switching system, which can complete the full analysis of complex gas components with one injection. Realize automated operation of instruments.
The maximum number of detectors that can be installed is 3 (FID, TCD, ECD, FPD, NPD), and a methane converter can be installed.
Start injection: Choose between manual and automatic modes. When selecting automatic injection, the program temperature rise function can be activated simultaneously.
Column box size: 280mm × 280mm × 270mm (length * depth * height)
Instrument size: 635mm × 580mm × 500mm (length * depth * height)

Hydrogen flame ionization detector (FID)	Detection limit: Mt ≤ 3 × 10-12g/s (n-hexadecane-isooctane solution); Baseline noise: ≤ 0.02mv Baseline drift: ≤ 0.15mv/h Linear range: ≥ one hundred and seven Maximum operating temperature: ≤ 400℃
Thermal conductivity detector (TCD)	Sensitivity: S≥3500mV•ml/mg Baseline noise: ≤ 0.02mv Baseline drift: ≤ 0.15mv/h Linear range: ≥ one hundred and five Maximum operating temperature: ≤ 400℃
Electron Capture Detector (ECD)	Detection limit: ≤ 1 × 10-14g/s (Hexachlorocyclohexane Isooctane Solution) Baseline noise: ≤ 0.03mV Baseline drift: ≤ 0.2mV/h Linear range: ≥ one hundred and four Radioactive source: 63Ni
Flame photometric detector (FPD)	Detection limit: (S) ≤ 5 × 10-13g/s; (P) ≤ 1 × 10-13g/s (methyl parathion anhydrous ethanol solution) Baseline noise: ≤ 0.03mV Baseline drift: ≤ 0.2mV/h Linear range: ≥ 103（S） 102（P）
Nitrogen phosphorus detector (NPD)	Detection limit: (N) ≤ 1 × 10-13g/s; (P) ≤ 5 × 10-14g/s (azobenzene malathion isooctane solution) Baseline noise: ≤ 0.03mV Baseline drift: ≤ 0.2mV/h Linear range: ≥ 102（N） 103（P）

Widely applied in various analytical fields to ensure public safety, health, and environment