The automatic secondary thermal analyzer is mainly used for effective analysis of volatile and semi volatile organic compounds (VOCs/SVVOCs) in samples such as the environment and materials. Its core function is to improve detection sensitivity through two thermal analysis processes (initial analysis of sample tube and secondary focusing analysis of cold trap), combined with gas chromatography (GC) or gas chromatography-mass spectrometry (GC-MS) to achieve effective analysis of complex samples.
Features:
Automated processing: It can automatically complete processes such as sample sampling, desorption, and injection without manual intervention, and supports continuous analysis of multiple samples.
High sensitivity detection: adopting a two-stage thermal analysis structure (electronic refrigeration+two-stage low-temperature focusing), significantly improving the resolution and resolution, suitable for trace substance detection.
Multi domain application: widely used in environmental monitoring, materials science and other fields, in line with the technical requirements of national standards for organic pollutant detection.
Core components and functions
Sampling tube interface: Compatible with different specifications of sampling tubes (such as glass or stainless steel tubes with inner diameters of 6mm and 8mm), supports automatic loading and unloading, and enables unmanned operation.
Analysis furnace: Used for a single thermal analysis, it is necessary to accurately control the temperature (within ± 1 ℃) and analysis time to ensure that the target substance is desorbed and not decomposed.
Cold trap system:
Fill a small amount of effective adsorbent (or air-cooled trap) and combine it with low-temperature refrigeration to achieve focused enrichment of the target substance.
Equipped with rapid heating function (such as heating rate above 100 ℃/s), to avoid peak broadening of the target substance during secondary analysis.
Carrier gas control system: Control the flow rate and switching of carrier gases (such as nitrogen and helium) through precision valves and flow meters to ensure the stability of the analysis, purging, and transmission processes.
Automatic sampler: can accommodate multiple sampling tubes (such as 20-100 positions), automatically complete the replacement and analysis process of sampling tubes according to the preset program, and improve analysis efficiency.
Control system: parameter settings (temperature, time, carrier gas flow rate, etc.), process monitoring, and data recording are implemented through touch screen or software, supporting linkage with GC system.