Introduction: The thermal desorption instrument is a sample pretreatment device that can be used with all imported and domestic gas chromatographs. The minimum detection concentration of volatile organic compounds in the environment can reach the ppb level. The thermal desorption instrument can meet the requirements of “Determination of Benzene, Toluene, Xylene in Indoor Air” and “Determination of Total Volatile Organic Compounds (TVOC) in Indoor Air” in GB50325-2020 “Indoor Environmental Pollution Control Standards for Civil Construction Engineering” In addition, it can also be applied to the following fields: occupational safety, industrial hygiene and environmental monitoring; rapid identification of unknown atmosphere; analysis of fragrances and flavors; assessment of toxic substances accidents; quality control testing in polymer and packaging industries; volatile organic compounds in vehicles Sampling and determination of aldehydes and ketones; residual analysis of drugs and court samples; collection of patient breath in hospitals, detection of volatile drug metabolites in blood, etc. Features: 1. Automated design, one machine with multiple functions, easy to operate; 2. Microcomputer control, large-screen LCD display, touch keyboard, digital input 3. Equipped with an external loading gas adjustment system, it can be operated without any modification or change to the GC instrument, and the original instrument carrier gas can be used; 4. The sample transfer tube and injection valve have automatic backflushing function to avoid cross-contamination of different samples; 5. This machine comes with the function of standard sample simulation sampling, which can make the working curve through the thermal desorption instrument more conveniently; 6. Through the programming of foreign affairs time, the functions of desorption, sample injection, analysis and backflush after analysis can be automatically realized; 7. For the analysis of active substances, a 0.53mm elastic quartz tube can be selected as the sample transfer tube; 8. The injection needle is easy to replace and can be connected to all types of GC injection ports at home and abroad; 9. In order to be more convenient and accurate to use with imported GC, this instrument is also equipped with special interfaces for various imported instruments, which is convenient to connect. technical parameter: Temperature control range of sample area: Room temperature—400℃ in increments of 1℃. Heating power is about 200W; Temperature control range of valve sampling system: Room temperature—180°C in increments of 1°C. Heating power is about 60W; Temperature control range of sample transfer pipeline: Room temperature—200℃ in increments of 1℃, heating power about 40W (For operational safety, low-voltage power supply is used for temperature control of the transmission pipeline); Temperature control accuracy: <±0.1℃; Temperature control gradient: <±0.1℃; Desorption recovery rate:> 95% (related to the composition); Analog sampling flow: 100ml/min Backflush cleaning flow: 0～200ml/min (continuously adjustable); Instrument size: ≤400×170×300mm3; Instrument weight: ≤12kg.
Introduction: The thermal desorption instrument is a sample pretreatment device that can be used with all imported and domestic gas chromatographs. The minimum detection concentration of volatile organic compounds in the environment can reach the ppb level. The thermal desorption instrument can meet the requirements of “Determination of Benzene, Toluene, Xylene in Indoor Air” and “Determination of Total Volatile Organic Compounds (TVOC) in Indoor Air” in GB50325-2020 “Indoor Environmental Pollution Control Standards for Civil Construction Engineering” In addition, it can also be applied to the following fields: occupational safety, industrial hygiene and environmental monitoring; rapid identification of unknown atmosphere; analysis of fragrances and flavors; assessment of toxic substances accidents; quality control testing in polymer and packaging industries; volatile organic compounds in vehicles Sampling and determination of aldehydes and ketones; residual analysis of drugs and court samples; collection of patient breath in hospitals, detection of volatile drug metabolites in blood, etc.
