Thermal desorption

• AutoTDS-IThermal analysis absorptionApplicable standards:

  ØGB50325-2020 Code for Indoor Environmental Pollution Control of Civil Building Engineering

  Ø《HJ583-2010Determination of Benzene Compounds in Environmental Air Solid Adsorption/thermal desorption-Gas Chromatography Method

• AutoTDS-I 型Thermal analysis rateIt is a fully automatic direct injection modelThermal desorptionceremonyThe gas circuit adopts a combination of electric six way valves and solenoid valves, which can automatically program the desorption, injection, and blowback processes of the adsorption tube. The heating temperature of the adsorption tube and the pipeline can be independently set, and synchronous signals are output during injection, which can simultaneously start the chromatography and workstation.

• performance

1. Normal working conditions of the instrument

Power Supply:220±22VAC 50±0.5Hz(Ensure reliable grounding of power ground wire and chassis grounding)

Ambient temperature+5℃~35℃

Relative humidity: ≤85%

2.technical indicators

1. Power:<200VA

2. Timing range: 1 second~99minute59second

3. Gas path pressure resistance:>40.4MPa

4. Synchronous signal output: Two 1-2 second switching signals

5. use

6. APreparation before use

7. Connect nitrogen gas to the instrument before use to ensure that there is no air leakage at the joint;

8. Connect the "exhaust port" interface of the instrument to the washing bottle;

9. Connect the stainless steel capillary tube of the instrument to the chromatographic injection port;

10. Insert the power cord into the power slot;

11. Connect nitrogen through a three-way valve to the "back blowing carrier gas" and the carrier gas inlet of the chromatography, and connect the carrier gas at the chromatography injection port to the "chromatography carrier gas" interface.

12. Set time and temperature

13. Enter the 'Settings' stateWhen the instrument is in the "idle" state, press the "settings" button once to enter the "settings" state,EDisplay 'Settings' in the area;

14. Exit 'Settings Status'”When the instrument is in the "Settings" state, press the "Settings" button once to exit the "Settings" state,EThe area displays' idle ';

15. Modify time and temperatureWhen the instrument is in the "settings" state, three times and two temperatures can be modified. Press the right shift key to move the highlighted bar to the desired modification column, and then press "run" once/Press the "OK" button to enter the modification of the column. At this time, the leftmost position of the column will be highlighted. Press the "Add" button to change the size of that position. Press the "Right" button to move the highlighted position to the right. After the column modification is completed, press the "Run" button again/Press the "OK" button to exit the modification of this column.

16. Automatic desorption

17. ifCThe area is displayed as "Manual". Press the "Step" button once,CSwitch the area display to 'Auto', then click 'OK' once/Run "button, the instrument enters the automatic desorption process, at this timeDDisplay the time taken for each process in the area,EThe area displays' work '. After desorption is completed,EThe area displays "idle", and the instrument beeps to remind the user. The user presses the "cancel" button once, and the beep ends. The next sample can be desorbed.

18. Single step desorption process

19. The instrument provides three process functions for single step desorption. ifCThe area is displayed as "Auto". Press the "Step" button once,CSwitch the area display to 'Manual'. Press the right arrow key to switch the highlight bar to the desired process, and then press' OK '/Run "button, the instrument runs this process,EThe area displays' work '. After reaching the set time, the instrument beeps to remind the user until the user presses the "cancel" button, and the instrument returns to idle state.

    CDaily use

20. Turn on the power switch, check if the time and temperature settings are appropriate, and then wait for the instrument to heat up to the preset value.

21. Connect the adsorption tube and place it on the bracket in front of the heating box. After the temperature reaches the set value, start the desorption process according to the user's own needs, as shown in the following figure. The reference time for each stage is: desorption5-10Minutes, injection30Second, blow back10-20minute. The desorption process of the standard sample is only to inject the standard sample from the three-way injection port on the right during the "blowing" stage, and the rest is the same.

22. After desorption is complete, place the adsorption tube on the front bracket of the heating box to cool down before removing it, and then install the next sample adsorption tube.

23. Due to the temperature control system of this desorption instrument, it can independently activate the sample adsorption tube.