Crystallux 4000M Gas Chromatograph

Fully automated gas chromatograph

  1. General Details

    The Cristallux-4000M gas chromatograph is fully automated, from the input of the sample to the processing of the chromatographic information, including the functions of automatic control of the temperature of thermostats, flow rates and pressure of the carrier gas (EUG system), auxiliary gases, automatic ignition of detectors, control of flame burning during operation, measuring detector signals using a 24-bit ADC.

    A gas chromatograph includes more than 30 basic models, each of which can be adapted to a specific consumer task. The chromatograph consists of an analytical unit, a control station, control and processing of chromatographic information, which is used as a personal computer, and the program “NetChrom”, running in Windows. In addition, additional programs are supplied: calculation of the calorific value of natural gas, diagnostics of transformer oil, calculation of Shekhart control charts, identification of multicomponent mixtures (for example, vegetable oil, cognac, hydrocarbon fuel, etc.), data output to an external monitor.

    One computer can work in real time with several analytical units (up to eight), and in addition, control the operation and process signals from the Crystal 2000 and Cristalux 4000 gas chromatographs, and process signals from other brands of chromatographs through ADCs . Information is exchanged between a computer, analytical units and a chromatograph via standard interfaces such as RS-232C, USB. It is possible to control the chromatograph from a distance of up to 3000 m. To set modes and process information without using a computer, there is a remote control panel for the chromatograph based on a microcomputer with OC Windows.

    The analytical unit has up to three independent channels for the separation and processing of information and consists of a column thermostat, a removable analytical module, and an electronic gas flow control unit (ECG). By individual order, four detectors can be installed. To start the analysis, a “Start” button is provided in each channel, which is duplicated by a soft button.

    The chromatograph is available in two models: with a column thermostat volume of 7 l (version 1) or 14 l (version 2). Thermostats allow you to place up to four nozzle (metal or glass) or three capillary columns. The thermostat is controlled using a new high-precision temperature control algorithm, which improves the accuracy of temperature maintenance.

    The top panel of the thermostat (analytical module) can be fixed in the working or inclined position (at an angle of 35 0 – version 1 and 12 0 – version 2).

    The rotation of the panel provides ease of installation and replacement of columns, which is equivalent to an increase in the volume of the thermostat in versions 1 and 2 by 3l and 5l, respectively. Thus, the effective volume of thermostats is 10 and 19 l for versions 1 and 2, respectively.

    On the top panel there is a cover designed to access the gas circuit for its switching.

    To operate the thermostat in the negative temperature range, one of two cryostatization devices can be connected to the thermostat (using a refrigerant – liquid nitrogen, while achieving a lower temperature limit of minus 100°C and without using a refrigerant – a lower temperature limit – up to minus 15°C) . Simultaneous analysis on two capillary columns with independent control of carrier gas flows is possible. It is possible to divide the flow after the capillary column into two detectors and enter the sample simultaneously in two columns.

    Depending on the chromatograph model, the EUPG unit controls from two to seven flows, including hydrogen and air, using electronic gas flow and pressure regulators, and a programming mode for the flow and pressure of the carrier gas is provided. To control the flow,  a new reliable solenoid valve is used in the gas flow regulator .

    Gas chromatographs of the Crystallux series are equipped with an electronic pressure regulator, by means of which the flow rate of the carrier gas through the capillary column is set. Sample discharge from the capillary injector (split, split-splitless modes) is carried out using an electronic gas flow regulator and trap, which also serves as a pressure buffer for the evaporated sample. The buffer is automatically cut off when the device is turned off using the reset valve. It is possible to maintain the optimal gas mode of the capillary column by programming the carrier gas flow by pressure, linear velocity or mass flow. There is a gas saving mode and a chromatograph “sleep” mode.

    The inlet gas pressure is stabilized by electronic pressure regulators. It is possible to use two carrier gases, as well as switch between them.


     

  2. Technical Info
    Parameter

    Value

    Design 1

    Design 2

    FID detection limit2×10-12 gC/sec for n-hydrocarbons 1,4×10-12 gC/sec for propane1,1×10-12 gC/sec for n-hydrocarbons 1,1×10-12 gC/sec for propane
    TCD detection limit 1×10-9 g/ml for n-hydrocarbons8×10-10 g/ml for n-hydrocarbons
    4×10-10 g/ml for propane (micro-TCD)
    ECD detection limit 2×10-14 g/sec for lindane1×10-14 g/sec for lindane
    4×10-15 г/с g/sec for lindane (micro-ECD)
    FPD detection limit 1×10-13 gP/sec for phenitrothion
    1×10-12 gP/sec for phenitrothion
    1×10-13 gP/sec for phenitrothion
    1×10-12 gP/sec for phenitrothion
    NPD detection limit 2×10-14 gP/sec for phenitrothion
    3×10-13 gN/sec for azobenzene
    2×10-14 gP/sec for phenitrothion
    3×10-13 gN/sec for azobenzene
    CCD detection limit 5×10-10 g/ml for hydrogen4×10-10 g/ml for hydrogen
    PID detection limit 
    HID detection limit 
    MSD – relation to signal/noise 
    5×10-13 g/sec for benzene
    3×10-13 g/sec for carbon in methane
    50:1 for injecting 1×10-12 g/mcl octaftornaftaline in isooctane
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    5×10-13 g/sec for benzene
    2×10-13 g/sec for carbon in methane
    500:1 (1500:1) 1 for injecting 1×10-12 g/mcl octaftornaftaline in isooctane
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    Linear dynamic range FID 
    Linear dynamic range TCD 
    1×107
    1×106
    1×107
    1×106
    Column thermostat volume 7 (10) l14 (19) l
    Column temperaturefrom ambient temperature +4 till +400 °C
    (by special order up to450 °C)
    (by special order up to-15 °C
    with the usage of refrigeration unit)
    (by special order up to-100 °C
    with the usage of liquid N2)
    from ambient temperature +3 °C till +400 °C
    (by special order from 450 °C)
    (by special order from -15 °C
    with the usage of refrigeration unit)
    (by special order from -100 °C
    with the usage of liquid N2)
    Temperature setting scale 0,1 °C0,1 °C
    Temperature stability 0,01 °C0,01 °C
    Temperature programming speed from 0,1 till 120 °C/min.от 0,1 до 125 °C/min.
    (by special order from 150 °C/min)
    Maximum number of isothermsnot less than 30not less than 30
    Column thermostat cooling speed
    from 400 till 50 °C
    8 min.3,2 min.
    Maximum temperature of detector and injector
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    450 °С450 °С
    Carrier-gas consumptionfrom 0 till 100 ml/min.
    (by special order up to 500 ml/min.)
    from 0 till 100 ml/min.
    (by special order up to 500 ml/min.)
    Carrier-gas pressure (for capillary column)from 0 till 0,40 MPa
    (by special order up to 1 Mpa)
    от 0 до 0,40 MPa
    (by special order up to 1 MPa)
    Maximum gas inlet pressure
    by special order
    0,5 MPa
    1,25 MPa
    0,5 MPa
    1,25 MPa
    Hydrogen consumption 
    Air consumption 
    0-500
    0-1000
    0-500
    0-1000
    Dimensions (width × depth × height)550×445×405 mm550×500×500 mm
    Weight33 kg39 kg
    Electric power supplyfrom AC voltage (220) V, frequency (50±1) Hzfrom AC voltage (220) V, frequency (50±1) Hz
    Maximum power consumption (in the steady)900 VA900 VA
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