Thermal analyzer

RJ701Thermal analyzerIt is a secondary thermal desorption device with a cold trap used for thermal desorption analysis by gas chromatography. It is an economical and practical secondary thermal desorption instrument. Working principle: The solid sample or adsorption tube for the analyte is placed in a thermal desorption instrument, and the device is started. Firstly, the adsorbate in the adsorption tube is blown off by desorption gas at high temperature into a small adsorption tube in the cold trap, and is adsorbed by the adsorbent in the small adsorption tube at low temperature. Then, the valve automatically switches to the carrier gas path connected to the gas chromatograph. The small adsorption tube quickly rises to high temperature, and the adsorbent in the small adsorption tube is desorbed by the carrier gas to the gas chromatograph for separation and analysis.

Application scope:

Widely used for the determination of benzene in indoor air and the determination of total volatile organic compounds (TVOC); Rapid identification of unknown atmosphere; Analysis of spices and essence; Assessment of toxic substance accidents (when personnel can safely return to the accident site); Security monitoring of the perimeter environment of the warehouse; Quality control testing in the polymer and packaging industries; Evaluation of drug solvents and product purity; Residual analysis of drugs and court samples; Collecting exhaled gases from patients to detect volatile drug metabolites in their blood and in various fields such as life sciences, industry, agriculture, environmental protection, pharmaceuticals, tobacco, education, petrochemicals, toxicology, food, electronics, etc; Widely used in the analysis and testing fields of air pollution, packaging materials, spices, drug residues, construction engineering and decoration, petroleum, chemical, food additives, etc.

RJ701Thermal analyzerPerformance Characteristics

1. Power on self-test, fault alarm and prompt function, temperature overload protection function, leakage protection function, air circuit pressure difference alarm function, etc., improve the safety factor of instrument use;

2. Adopting a touch screen for convenient editing, saving, and calling methods, a brand new human-computer interaction interface, separate detection method settings, and real-time display of work status, running time, traffic, etc; The heating temperature of the adsorption tube, pipeline, and six way valve can be independently set; For operational safety, the temperature control of the transmission pipeline adopts low-voltage power supply;

3. To ensure a narrow chromatographic peak shape, a low-temperature secondary desorption function is provided, and an electronic refrigeration and two-stage flash evaporation thermal desorption process is used; Adopting advanced electronic refrigeration equipment, no need for liquid nitrogen refrigeration;

4. The gas circuit adopts a combination of electric six way valves and solenoid valves to automatically achieve stable performance and effectively prevent sample contamination during desorption, injection, and blowback cleaning processes. It is equipped with an automatic gas circuit leak detection function;

5. The machine comes with a standard sample simulation sampling function, also known as the "calibration" function, which can easily create working curves through a thermal desorption instrument;

6. Through time programming, automatic functions such as desorption, purging, adsorption, injection, backwashing, and activation can be achieved;

7. Using a motion furnace, the high-temperature furnace automatically moves onto the adsorption tube during desorption; The high-temperature furnace automatically moves away after desorption is completed, and the desorption furnace does not need to be cooled down each time, achieving automatic and efficient desorption;

8. Adopting international standard adsorption tubes (length 89mm, outer diameter 6.4mm), the adsorption tubes can withstand a maximum temperature of 420 ℃;

9. The injection needle is easy to replace and can be connected to all models of GC injection ports at home and abroad;

10. Can synchronously start GC and workstation;

11. Simple, fast, sensitive, reliable, and accurate operation. The arc-shaped streamlined structure is beautiful, generous, and practical.