Angstrom Advanced Model GC112A Gas Chromatograph

Angstrom Advanced Model GC112A Gas Chromatograph



Main features

  • Brand-new microcomputer temperature control system of world advanced control technology. High accuracy of temperature control (optimum: ±0.05°C), high reliability and anti-interference.
  • User control and operating parameters (including for detectors) are set up by the keyboard. Self-diagnosis system, power-fail protection, file storage and call, limited temperature setting. Accurate display of setting and actual value of temperature control of each path, bridge current of TCD, sensitivity of FID, retention and analysis time.
  • Four paths of independent control sections: column oven, sample injector, detector and thermal conductive pond.
  • 5-ramp programmed temperature rising control system. Auto-drop of temperature of column oven (auto-opening the door behind the oven) to a fast cooling.
  • Dual FID provided with options of GC112 A-TCD, GC112A-ECD, GC 112 A-FPD and GC112A-NPD, gas sampling valve, transformation oven, absorber and pyrolysis absorber available for selection. Two detectors can be installed at the same time with high sensitivity.It takes a very short time to stabilize and it’s very easy to clean and install the nozzle.
  • Packed column and capillary column (0.53 large diameter or small diameter) can be installed easily.A complete set of split sampling connectors and tailing connectors are installed free of charge. Optional 0.53mm large diameter capillary direct sampler is available as an option.
  • Analysis can be conducted in packed or capillary column with multiple sampling methods.
  • Packed column: on-column sampling, instantaneous vaporized sampling and gas sampling.
  • Capillary column: split sampling and 0.53mm large diameter capillary direct sampling.
  • Construction of dual gas path, dual sample injector and dual packed column system can effectively avoid baseline undulation and drift in real time and facilitate programmed temperature rising analysis. Accurate and scaled type gas path control valves will provide a high repeatability and stability.
  • Advanced functions: auto ON/OFF temperature control system, permanent data storage, file storage and call and over-temperature protection.
  • Large volume column (300×280×270) can hold capillary column and dual packed column. Built-in heating filament structure is in favor of quartz capillary analysis.
  • A complete set of accessories including purifier, pressure-reducing valve, gas path tube, wrench and tools, injection needle and many different connectors are provided free of charge and are ready to connect with supply-air system prepared by users.


Temperature control

Control range 7°C – 400°C above room temperature. (increment of 1°C)
Control objects column oven, detector, thermal conductive pond and sample injector
Programmed temperature rising 5 ramps
Rate of programmed temperature rising 0.1°C -40°C (increment of 0.1°C)
Thermostatic time 0-655 min (increment of 1 min)


Sensitivity (minimum testability) M≤5×10-11 g/s (sample: C16)
Optimum testing result M≤1×10-11 g/s
Noise ≤5×10-14 A
Drift ≥6×10-13 A/h
Linear range ≥5×106


Sensitivity ≤
Noise ≤20 μV
Drift ≤30 μV
Linear range ≥104


Temperature range 350°C Max
Measuring mode 63Ni
Sensitivity ≤10-13 g (Benzex)
Linear range ≥103


Sensitivity (minimum testability) ≤2°10-11 g (P)/s (sample P in the parathion methyl)
≤3.8×10-12g (P)/s (Optimal testing result)
Sensitivity (minimum testability) ≤1×10-10 g (S)/s (sample: S in the parathion methyl)
≤2.7×10-11 g (S)/s (Optimum testing result)
Linear range ≥103 (sample P parathion)
≥102 (sample S parathion)
Stability ≥30μV/h
Noise ≤10 μV
Starting time not greater than 2 hours


Sensitivity (minimum testability) Dt(N) ≤5pg (N)/s (sample: azobenzene)
0.5ppm (Optimal testing result)
Sensitivity (minimum testability) Dt(P) ≤0.5pg (P)/s (sample: malethion)
0.2ppm (Optimum testing result)
Drift ≤8×10-13 A/h
Noise ≤5×10-13 A
Linear range ≥103
Max application temperature not greater than 2 hours

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