TDGC-400 series thermal analysis gas chromatograph

TDGC-400 series thermal analysisgas chromatographIntroduction:
A sample pretreatment device in the thermal analysis gas chromatography analysis and detection system, which mainly uses physical methods to heat and adsorb the sample, thereby achieving the purpose of purifying the sample. In the sample processing of gas chromatography, the working principle of the thermal analyzer is to inject the sample to be tested into an adsorption tube filled with an adsorbent (the appropriate adsorbent in the thermal analyzer adsorption tube must be determined based on the properties of the sampled sample), where volatile components are adsorbed and eliminated, and the remaining sample in the adsorption tube is heated to desorb the collected volatile organic compounds. The sample to be tested enters a capillary column gas chromatograph equipped with a flame ionization detector for analysis along with an inert carrier gas. Thermal analyzer has the advantages of convenient sampling, fast inspection, and accurate quantification, and is widely used in gas chromatography analysis systems. The fully automatic thermal analysis gas chromatograph meets the requirements of gas chromatography detection and analysis of total volatile organic compounds (TVOC) and benzene in indoor air (this method complies with the national standards of GB/T 50325-2010 "Code for Indoor Environmental Pollution Control of Civil Building Engineering" and HJ 583-2010 "Determination of Benzene Compounds in Environmental Air Solid Adsorption/Thermal Desorption Gas Chromatography Method")
Thermal analysis gas chromatography is mainly used in the following fields:
1. Occupational safety, industrial hygiene, and environmental monitoring;
2. Rapid identification of unknown atmosphere;
3. Analysis of spices and essence;
4. Assessment of toxic substance accidents (when personnel can safely return to the accident site);
5. Perimeter environmental safety monitoring of chemical warehouses;
6. Quality control testing in the polymer and packaging industries;
7. Evaluation of drug solvents and product purity;
8. Residual analysis of drugs and court samples;
9. Collecting exhaled gases from patients and detecting volatile drug metabolites in their blood in hospitals.
Technical parameters of thermal analysis gas chromatograph:
1. The gas circuit adopts a combination of electric six way valves and solenoid valves to automatically achieve desorption, injection, and blowback cleaning processes
2. Adopting a touch screen for convenient editing, saving, and calling methods
3. The heating temperature of the adsorption tube, pipeline, and six way valve can be independently set,
4. The machine comes with the function of simulating and sampling standard samples, which makes it more convenient to create working curves through a thermal desorption instrument;
5. Through time programming, automatic functions such as desorption, blowdown adsorption, injection, and blowback cleaning (activation) can be achieved;
6. Using Simple Lock locking sealing technology to achieve simple and reliable fixation and sealing of sampling tubes, efficient work can be achieved by fixing and disassembling the sampling tubes in 2 seconds
7. Adopting semiconductor refrigeration, high cooling efficiency, no need for external refrigeration equipment, saving usage costs
7. Adopting international standard adsorption tubes (length 89mm, outer diameter 6.4mm), the adsorption tubes can withstand a maximum temperature of 420 ℃ and are sealed with PTFE caps to ensure longer storage time of the samples;
8. The injection needle is easy to replace and can be connected to all models of GC injection ports at home and abroad
Main technical parameters of thermal analysis gas chromatograph：
1. Temperature control range of the pipette: room temperature -400 ℃, accuracy: 1 ℃;
2. Temperature control range of valve injection system: room temperature -220 ℃, accuracy: 1 ℃;
3. Temperature control range of sample transfer pipeline: room temperature -260 ℃, accuracy: 1 ℃;
4. Temperature range for secondary analysis: -35 ℃ -400 ℃, heating rate for secondary flash evaporation:>3000 ℃/min
5. Desorption recovery rate:>98% (depending on the composition);
6. Backblowing cleaning flow rate: 0-600ml/min (continuously adjustable);
7. Simulated sampling flow rate: 100ml/min;


The pictures of the thermal analysis gas chromatograph are for reference only. Please refer to the actual product. For more configuration and detailed technical information, please call our company for inquiries and requests.



For more information on gas chromatography application methods, please call 400-021-0456 for consultation
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HJ 703-2014 Determination of Phenolic Compounds in Soil and Sediments Gas Chromatography Method
HJ 741-2015 Determination of volatile organic compounds in soil and sediment by headspace gas chromatography method
HJ 742-2015 Determination of volatile aromatic hydrocarbons in soil and sediment by headspace gas chromatography method
HJ 890-2017 Determination of Polychlorinated Biphenyls Mixtures in Soil and Sediments Gas Chromatography Method
HJ 921-2017 Determination of Organochlorine Pesticides in Soil and Sediments Gas Chromatography Method
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40 GB 23200.40-2016 Determination of Organophosphorus and Organochlorine Pesticide Residues in Cola Beverages Gas Chromatography Method
42 GB 23200.42-2016 Method for detecting residues of flupyradifurone in grains
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44 GB 23200.44-2016 Method for detecting residues of carbon disulfide, carbon tetrachloride, and dibromoethane in grains
55 GB 23200.55-2016 Determination of residual levels of 21 fumigants in food by headspace gas chromatography
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88 GB 23200.88-2016 Method for detecting residues of various organochlorine pesticides in aquatic products
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97 GB 23200.97-2016 Determination of 5 Organophosphorus Pesticide Residues in Honey Gas Chromatography Method
98 GB 23200.98-2016 Determination of 11 Organophosphorus Pesticide Residues in Royal Jelly Gas Chromatography Method
100 GB 23200.100-2016 Determination of multiple pyrethroid pesticide residues in royal jelly by gas chromatography method
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