1、 Instrument Introduction
Shanghai Kechuang Chromatography Instrument Co., Ltd. has accumulated more than ten years of experience in specialized gas chromatographs for environmental air analysis, and continuously improves and optimizes the instruments in this field. The adsorption tube can be directly inserted into the heating block for rapid and uniform heating, with good desorption effect.
Customers can choose between a single thermal desorption or a secondary thermal desorption sampling method. One thermal desorption is achieved by directly desorbing and injecting the sample through an adsorption tube; Secondary thermal desorption refers to the adsorption of samples through adsorption tubes and secondary cold focusing, resulting in high recovery rates, good peak shapes of components, and high separation efficiency.
The HL-800 secondary thermal desorption analyzer produced by the company can be used in conjunction with various types of domestic and imported gas chromatographs or gas chromatographs, and can also be retrofitted with existing scientific and technological gas chromatographs.
2、 Execution standards
3、 Instrument features
3.1. LCD screen or 5.7-inch color touch screen;
3.2. A fully computerized reverse control system, with a single computer capable of controlling up to 253 chromatography instruments and 7 temperature control channels; 8-channel external event time program;
3.3. The instrument is equipped with an indoor environment monitoring dedicated chromatography workstation, which has functions such as intelligent peak identification/automatic processing, multi-channel spectrum integration and exchange, automatic application of toluene to calculate unknown peak content, automatic conversion of sampling volume to standard state based on environmental temperature and pressure, and automatic calculation of the content of each component and the whole in the unit sampling volume. It can also deduct the peak area of each component in the solvent and the content of each component in the outdoor air sample to obtain the final result;
3.4 The instrument adopts RJ45 Ethernet interface, which makes signal output and control acquisition simple and convenient, and can realize remote control, remote data transmission, processing and supervision of the instrument. Can be connected to unit supervisors and higher-level supervisors for easy supervision by supervisors;
3.5. Large capacity column box with automatic rear opening door, capable of 8-step programmed heating, and column box with near room temperature control function (5 ℃ above room temperature);
3.6. Equipped with fault self diagnosis function, displaying the location and nature of the fault at any time; Equipped with over temperature protection function, any temperature exceeding the set temperature will automatically stop heating.
Note: For other parameters of the instrument, please refer to the introduction of the gas chromatography host.
GC9800 gas chromatograph (link)
GC2002 gas chromatograph (link)
4、 Instrument configuration
4.1. Configuration of a thermal desorption instrument
4.2. Configuration of secondary thermal desorption instrument
The gas chromatography host can be selected from GC9800 or GC2002 models
Instrument detailed parameter link:
GC9800 gas chromatograph
GC2002 gas chromatograph
5、 Workstation operation interface
6、 Analyze the graph and conditions
Analysis spectrum of benzene standard sample 3 # (0.5mg/ml)
Analysis spectrum of air TVOC samples
Guiding technical article link
[1] Zhang Tianlong, Shi Jin, Qi Xiaohua Experimental study on the application of secondary thermal desorption technology to analyze TVOC [C]. Cross Strait Conference on Analytical Chemistry two thousand and six
[2] Zhang Tianlong, Shi Jin Experimental Study on Method Conditions for Detecting Benzene and TVOC in Indoor Air [J]. China Building Materials Science and Technology, 2004
[3] State Environmental Protection Administration Monitoring and Analysis Methods for Air and Waste Gas [M]. China Environmental Science Press, 2003
[4] Xu Bohong, Yan Huifang Monitoring Methods for Hazardous Substances in the Workplace [M]. China People's Public Security University Press, 2003
[5] Cui Jiusi Indoor Air Pollution Monitoring Method [M]. Chemical Industry Press, 2002
[6] Cui Jiusi Indoor Environmental Monitoring Instruments and Application Technology [M]. Chemical Industry Press, 2004
National/Industry Standard Links
GB/T18883-2002 Indoor Air Quality Standards
GB50325-2010 Code for Indoor Environmental Pollution Control of Civil Building Engineering (2013 Edition)