Fully Automatic Secondary Thermal Desorption Instrument, JX-7MT (CAT#: STEM-AIAE-0543-ZJF)

The JX-7MT Thermal Desorption Analyzer is a fully automatic dual-stage (cold trap) thermal desorption instrument featuring 24 sample positions. It utilizes semiconductor cooling, with the cold trap temperature capable of reaching as low as -35°C (depending on experimental environmental temperature). The injection valve system is motor-driven, and the needle penetration is pneumatic. It features standard sample simulation sampling functionality. The enrichment, injection, and other processes are fully automated. It can be used in conjunction with domestic and imported gas chromatographs and is suitable for applications in environmental monitoring. It is capable of determining volatile and semi-volatile organic compounds.

Primary Desorption Heating Range: Room Temperature—400℃, Adjustable in 1℃ Increments
Injection Valve Heating Range: Room Temperature—240℃, Adjustable in 1℃ Increments
Sample Transfer Tube Heating Range: Room Temperature—240℃, Adjustable in 1℃ Increments
Cold Trap Cooling Range: -35—50℃, Adjustable in 1℃ Increments
Secondary Desorption Temperature Range: -35℃—450℃
Secondary Desorption Heating Rate: >70℃/s
Temperature Control Accuracy: < ±0.1℃
Temperature Control Gradient: < ±0.1℃
Sample Tube Specifications: Diameter 1/4”, Length 3.5”
Sample Positions: 24 positions
Enrichment Time: 0-60min
Injection Time: 0-10min
Simulated Sampling Time: 0-60min
Simulated Sampling Flow Rate: 0-200ml/min
Backflush Cleaning Flow Rate: 0-100ml/min (Continuously Adjustable)
Desorption Recovery Rate: >98% (depending on component)
RSD: ≤2.5% (0.05μg benzene in methanol)
Power: Peak 500W
Dimensions: 540×330×330(mm)
Net Weight: Approximately 25kg

Utilizes semiconductor refrigeration, optimizing cost efficiency.
Achieves a secondary analysis temperature ramp rate exceeding 70°C/s, reaching 450°C with peak widths less than 3s.
Employs gas lines constructed entirely from passivated and polished 316 stainless steel, with sealing rings made of PTFE material, ensuring high-temperature resistance and zero volatile emissions.
Features heating gas lines made of imported high-inertia deactivation stainless steel, with PTFE material seals for high-temperature resistance and zero emissions.
Incorporates precision high-temperature-resistant injection valves in the heating valve box, featuring no dead volume. The injection valve operates with motor drive, eliminating the need for external gas drive and ensuring convenient use.
Adopts an integrated design for the heating valve box and heating gas path, reducing intermediate links and minimizing the issue of low resolution caused by dead volumes.
Optimizes dead volume reduction by calculating the optimal diameter of the connection point between the analysis tube and the gas path, through meticulous consideration of the analysis tube and gas path diameters.
Equipped with standard sample simulation sampling functionality.

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