1.Product introduction

PTC-II automatic purge and trap instrument is a multi-position automatic purge and trap instrument with electronic cold trap. Accurate sampling is carried out with a syringe pump, and helium/nitrogen is used as a purging gas to bubble it into the sample solution; under continuous air purging, the volatile components in the sample escape with the purging gas and pass through a The trapping device equipped with adsorbent is concentrated; after a certain purging time, turn off the purging gas, switch the six-way valve to connect the trapping tube to the carrier gas path of the GC, and rapidly heat the trapping tube to capture the The sample components are desorbed and then enter the GC with the 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 volatiles (such as odor components) in food.

2. Product parameters

1. Sample position: 70 bits/140 bits, 40ml VOA sample bottle
2. Purge tube temperature: room temperature ~ 100 ℃, control accuracy ± 1 ℃
3. Cold trap (electronic semiconductor refrigeration) temperature: minimum refrigeration temperature Up to minus 30 degrees
4. Desorption temperature of capture tube: 150～380℃, heating rate >2400℃/min; from 250℃ to 35℃ within 90 seconds
5. Pipeline heating temperature: 50～200℃, control accuracy ±1℃
6. Heating temperature of water eliminator: room temperature～350℃
7. Glass purge tube: 5ml purge tube (standard); 25ml purge tube (optional)
8. Trap size: stainless steel Φ3mm× 180mm×0.1mm
9. Purge flow: 10～150ml/min
10. Max power: <800VA
11. Timing range: 1 second to 99 minutes and 59 seconds
12. Timing error: <0.1%
13. Gas circuit withstand pressure: > 0.4MPa
14. Synchronous signal output: two-way 1-2 seconds switching value
15. Dimensions of the instrument: height*width*length 500mm*320mm*500mm
16. Weight: about 30Kg

Working conditions:

1. Power supply: 220VAC±22VAC 50Hz±0.5Hz
2. Backflushing carrier gas pressure: ≤0.4MPa
3. Ambient temperature: 5～35℃
4. Relative humidity: ≤85%

3. Product features

1. Strong general performance: can be used with any brand of gas chromatograph (GC) and (GC-MS);
2. Simple operation, easy to use, full software control, high degree of automation: just put the sample bottle into the In the sample injection tray, all operations and controls are completed by the control software, so the sample repeatability is good; the main body is designed with a large touch LCD panel, which can track the temperature and operation commands throughout the process.
3. The cold trap adopts semiconductor refrigeration + air cooling, and the minimum refrigeration temperature can reach -30°C (at room temperature of 20°C), which meets most of the low-temperature enrichment needs.
4. The trap heating adopts direct resistance heating, and the heating rate is >2400℃/min.
5. The built-in foam sensor can detect the foam in the purge tube to prevent the way of contaminating the sample and protect the entire analysis system.
6. Users can customize the cleaning times of sampling needles and glass bottles.
7. The trap and the purge tube are separated from the backflushing gas to reduce cross-contamination between samples. During a backflush cycle, compounds blown from the trap do not flow into the purge line.
8. The water removal trap removes water vapor at the purging end, greatly reducing the influence of water vapor on GC and GC/MS.
9. The sample pipeline adopts PEEK material and silanized inert treated stainless steel tube to reduce pollution residue.
10. All pipelines and six-way valves are heated at controlled temperature to eliminate cold spots in the system and reduce sample loss.
11. Provide a synchronous interface, you can start the chromatography and workstation at the same time when injecting samples.