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    Purge and catch device

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    automatic purge and trap device

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    Pt-7900d automatic purge and trap device

    1、 Brief introduction of the instrument

    Pt-7900d full-automatic purge and trap device is developed and produced by Beijing Zhongyi Yusheng Technology Co., Ltd. It is mainly used for VOC analysis of water and soil, as well as volatile matter analysis in food. The standards met the standards of "hj639-2012 determination of volatile organic compounds in water quality by Purge and trap / gas chromatography-mass spectrometry", "hj686-2014 determination of volatile organic compounds in water quality by Purge and trap / gas chromatography-mass spectrometry", "hj605-2011 determination of volatile organic compounds in soil and sediment by Purge and trap / gas chromatography-mass spectrometry", etc.

    2、 Features and main functions of the instrument

    1. It can automatically run 1-30 samples without personnel on duty;

    2. Power on self-test, fault alarm and prompt, automatic positioning and calibration of sample disk;

    3. Microcomputer program control, the main functions are as follows:

    (1) method parameter setting, real-time animation display of working state and running time;

    (2) the temperature of injection valve, sample transfer tube, dewater trap and trap tube desorption area are separately heated and controlled;

    (3) set the analysis program and press the run key to automatically complete the analysis of all samples;

    (4) the GC and GCMS chromatographic data processing workstation can be started synchronously, and the device can also be started by external programs;

    4. Through time programming, the functions of purge, capture, desorption, sample injection and backwash cleaning can be realized automatically;

    5. The device has the function of automatic sample mixing;

    6. Electronic refrigeration and two-stage flash thermal desorption process are used to ensure narrow chromatographic peak shape;

    7. The sample transfer tube and injection valve have automatic back blowing function, which can avoid cross contamination of different samples;

    8. It is equipped with special starting line interface to synchronize GC and GCMS at home and abroad, and can connect all types of GC and GCMS at home and abroad;

    9. The sample passes through a water trap to prevent water vapor from entering into the trap tube, thus reducing the influence of water vapor on GC and GCMS;

    3、 Main technical parameters

    1. Temperature control range of water trap:

    From room temperature to 240 ℃, the heating power is about 400W in an increment of 1 ℃;

    2. Temperature control range of valve injection system:

    The heating power is about 60W at room temperature-220 ℃ in increments of 1 ℃;

    3. Temperature control range of sample transmission pipeline:

    From room temperature to 220 ℃, the heating power is about 40 W at an increment of 1 ℃;

    (low voltage power supply is used for temperature control of transmission line for operation safety)

    4. Desorption temperature control range of capture tube:

    From room temperature to 400 ℃, the increment is 1 ℃;

    (heating rate > 2000 ℃ / min)

    5. Cold trap temperature: the lowest cooling temperature can reach - 30 ℃, and electronic refrigeration device is used;

    6. Sample temperature control range:

    The heating power is about 200W at room temperature-240 ℃ in increments of 1 ℃;

    7. Temperature control accuracy: < ± 0.5 ℃;

    8. Temperature control gradient: < ± 1 ℃;

    9. Sample bottle station: 30 bits;

    10. Sample bottle specification: 40ml;

    11. Purging flow: 0-100ml / min (continuously adjustable);

    12. Back blowing flow: 0 ~ 200ml / min (continuously adjustable);

    13. Effective size of instrument: 580 × 450 × 500m3;

    14. Weight of the instrument: about 32kg.


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