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Automatic purge and trap device

Automatic purge and trap instrument for environmental analysis

Ptc-ii automatic purge and trap is a multi position automatic purge and trap with electronic cold trap.

  • model: PTC-Ⅱ

Ptc-ii automatic National standard purge and capture Brief introduction of the instrument:

Ptc-ii automatic purge and trap is a multi position automatic purge and trap with electronic cold trap. The injection pump is used for accurate sampling, and helium / nitrogen is used as purge gas to blow the sample solution for bubbling; under continuous air blowing, the volatile components in the sample escape with the purge gas and are concentrated by a trap equipped with adsorbent; after a certain purge time, the purge gas is closed, and the six-way valve is switched to connect the trap pipe to the carrier gas path of GC Fast heating the trap tube makes the captured sample group decompose and absorb, and then goes into GC with carrier gas for analysis.

Combined with GC or GC / MS, it can be widely used in environmental analysis, such as the analysis of organic pollutants in drinking water or wastewater, and the analysis of volatile compounds (such as odor components) in food.


The main features of ptc-ii automatic purge and trap instrument are as follows:

  • GC-MS and GC-MS can be used;

  • Easy to operate, easy to use, software control, high degree of automation: just put the sample bottle into the sample tray, all operation and control are completed by the control software, so the sample repeatability is good; the design of large touch LCD board in the host can track the temperature and operation command in the whole process.

  • The lowest refrigeration temperature is - 30 ℃ (room temperature is 20 ℃), which can meet most of the requirements of low temperature enrichment.

  • The trap was heated by direct resistance, and the heating rate was more than 2400 ℃ / min.

  • The built-in foam sensor can detect the foam in the purge tube to prevent contamination of the sample path and protect the entire analysis system.

  • Users can customize the cleaning times of sampling probe and glass bottle.

  • The trap is separated from the purge tube to reduce cross contamination between samples. During the blowback cycle, compounds blown out of the trap will not flow into the purge tube.

  • The effect of water vapor on GC and GC / MS is greatly reduced.

  • PEEK material and silylation inert treatment of stainless steel pipe were used in the sample pipeline to reduce the residual pollution.

  • All pipelines and six way valves can be heated at controlled temperature to eliminate the cold point of the system and reduce sample loss.

  • Synchronous interface is provided to start chromatography and workstation at the same time of injection


Ptc-ii automatic National standard purge and capture Working conditions of the instrument

Power supply: 220 VAC ± 22 VAC, 50 Hz ± 0.5 Hz

Back blowing carrier gas pressure: ≤ 0.4MPa

Environment temperature: 5 ~ 35 ℃

Relative humidity: ≤ 85%


Technical parameters of ptc-ii full automatic purge and trap instrument:

Sample grade: 70 bits / 140 bits, 40 ml VOA sample bottle

Temperature of purging pipe: room temperature ~ 100 ℃, control accuracy ± 1 ℃

Cold trap (electronic semiconductor refrigeration) temperature: the minimum cooling temperature can reach - 30 ℃

The desorption temperature of trap: 150-380 ℃, heating rate > 2400 ℃ / min; drop from 250 ℃ to 35 ℃ in 90 seconds

Heating temperature of pipeline: 50 ~ 200 ℃, control accuracy ± 1 ℃

Heating temperature of dehydrator: room temperature ~ 350 ℃

Glass purging pipe: 5ml purging pipe (standard configuration); 25ml purging pipe (optional)

Size of trap: stainless steel, Φ 3mm × 180mm × 0.1mm

Purge flow: 10-150ml / min

Maximum power: < 800VA

Timing range: 1 second to 99 minutes and 59 seconds

Timing error: < 0.1%

Pressure circuit: > 4MPa

Synchronous signal output: two-way 1-2 second switching value

External dimension of instrument: height * width * length: 500mm * 320mm * 500mm

Weight: About 30kg


label: Purge trap