instrumentCharacteristics and main functions of

1. Heating and temperature control of metal body, with high temperature control accuracy and small gradient；

2. The pre sample area makes it easier for personnel to place and sample samples;

3.Microcomputer programControl, the main functions are:

⑴ Method parameter settings, real-time working status, and running time;

⑵Sample areaSample injectionvalveSystem andsampletransmissionManage, all three channelsseparateHeating and temperature control;

⑶settingControl program,Press the run button to automatically complete the entire sample analysis；

⑷approvestorage9 methods,convenientCall at any time, achieving fast startup and analysis;

⑸ The GC and chromatographic data processing workstations can be started synchronously, and the device can also be started using external programs;

4. Equipped with an external carrier gas regulation system, headspace injection analysis can be performed without any modifications or changes to the GC instrument.Also optionalUse the original instrument carrier gas;

5. Automatically achieve pressurization, sampling, injection, analysis, and post analysis blowback through time programmingcleanOther functions;

6. Using pressure equilibrium injection technology for headspace injectionapproveObtain narrow chromatographic peak shapes；

7. Sample transmissiontransportpipeAnd the injection valveThere is an automatic blowback function, which avoids cross sampling of different samplesslopsDyeing;

8. For active substance analysis, an elastic quartz tube can be selected as the sample transfer tube;

9. approveAdjust the injection volume at any time according to the concentration of the sample to be analyzed by the customer;

10.The injection needle is easy to replace and can be connected to all models at home and abroadGCinjection port.

AHS-7890AHead Space Samplingimplement（pressure balanceMain techniques for sample injectionparameter

1. Temperature control range in the sample area:

Room temperature -22Heating power of approximately 400W is set at 0 ℃ in increments of 1 ℃;

2. Temperature control range of valve injection system:

Room temperature -18Heating power of approximately 60W is set at 0 ℃ in increments of 1 ℃;

3. Temperature control range of sample transfer pipeline:

Room temperature -20Heating power of approximately 40W is set at 0 ℃ in increments of 1 ℃;

（For operational safety, the temperature control of the transmission pipeline adopts low-voltage power supply）

4. Temperature control accuracy:< ±0.5℃ ；

5. Temperature control gradient:< ±0.5℃；

6. Headspace bottle workstation:12One;

7. Headspace bottle specifications: Optional20ml 、10ml（50ml and othersSpecifications can be customized);

8. Repeatability: RSD≤1.5%（200ppm ethanol in water, N=5）；

9. Injection volume control mode: InjectiontimeAnd pressurized pressureControl the injection volume；

10.Injection pressure range: 0-0.4Mpa (continuously adjustable);

11.Backblowing cleaning flow rate: 0~400ml/Min (continuously adjustable);

12.Effective size of the instrument:400×200×380mm3；

13.Weight of the instrument: approximately 15kg。