EXPEC 2000 Volatile Organic Compounds On-Line Analyzer Introduction
Volatile organic compounds in the atmosphere have the characteristics of complex composition, low content, strong activity, large difference in concentration and chemical activity. The system is used in conjunction with cryogenic pretreatment equipment, and mass spectrometry (MSD) is used to sample VOCs in the atmosphere. Online analytical monitoring. On-line gas chromatography-mass spectrometry utilizes chromatographic separation techniques and mass spectrometry techniques to efficiently monitor complex multi-component VOCs in the ambient atmosphere. A single sample can detect more than 100 types of VOCs (hydrocarbons, halogenated hydrocarbons, oxygenated/nitrogen-containing volatile organic compounds) samples.
The sample is dehydrated, concentrated and concentrated by a cryogenic pretreatment apparatus, and is rapidly desorbed by direct thermal high temperature desorption, and is quickly sent to a capillary column for separation. The separated low carbon (C2-C5) VOCs can be used as hydrogen samples. Flame ionization detector (FID) is used for detection; VOCs samples of high carbon (C6-C12), oxygenated, halogenated hydrocarbons, etc. are detected by mass spectrometry (MSD) to obtain accurate qualitative and quantitative determination of each single component. Analysis results. Features
1, the detection factor is more
The GC-MS/FID dual detector system performs atmospheric VOCs detection. It can detect more than 100 VOCs in one sampling, including hydrocarbons, halogenated hydrocarbons, oxygenated/nitrogen-containing volatile organic compounds, and covers typical organic pollution factors (PAMS 57). Species, 65 species of TO-15, 43 species of TO-14).
2, excellent sensitivity
The sample is enriched at low temperature, and the sample enrichment efficiency is high. Combined with the highly sensitive industrial grade detector, the detection sensitivity of various VOCs is excellent;
3. Qualitative and quantitative analysis is accurate
Configure a dedicated VOCs database for rapid and accurate identification of environmental VOCs;
The use of mass spectrometric characteristic ions and chromatographic retention time double confirmation, accurate alarms exceeded, greatly reducing the workload of data review.
4, high reliability
Adopt industrial grade online GC-MS combined instrument, which has strong environmental adaptability in terms of temperature, humidity and vibration;
Oil-free scroll pump combined with molecular pump for the design of a fully oil-free vacuum system;
After the power is turned off, the system automatically runs cyclically.
5, easy to install and maintain
The whole machine adopts standard cabinet design, which can be installed directly in the station building, which is convenient for installation and maintenance;
High system integration, small size, low power consumption;
Boot to the analysis time is short;
6, the software is simple and easy to use
Graphical operation interface;
Independent intellectual property rights, can quickly customize and upgrade hardware and software according to actual application requirements Technical Parameters
Detection principle: mass spectrometry
Response time: ≤60min (adjustable)
Accuracy: ≤3%
Resolution: propane ≤ 0.01ppb, other ≤ 0.1ppb; benzene ≤ 0.02ppb, n-decane ≤ 0.01ppb, 1,2-dichloropropane ≤ 0.01ppb, acetone ≤ 0.04ppb, other ≤ 0.1ppb
Detection range: more than 100 volatile organic compounds, including PAMS (56 species), TO14 (39 species), TO15 (64 species); and atmospheric oxygen, nitrogen-containing organic compounds, halogenated hydrocarbons, etc.
Introduction
Volatile organic compounds in the atmosphere have the characteristics of complex composition, low content, strong activity, large difference in concentration and chemical activity. The system is used in conjunction with cryogenic pretreatment equipment, and mass spectrometry (MSD) is used to sample VOCs in the atmosphere. Online analytical monitoring. On-line gas chromatography-mass spectrometry utilizes chromatographic separation techniques and mass spectrometry techniques to efficiently monitor complex multi-component VOCs in the ambient atmosphere. A single sample can detect more than 100 types of VOCs (hydrocarbons, halogenated hydrocarbons, oxygenated/nitrogen-containing volatile organic compounds) samples.
The sample is dehydrated, concentrated and concentrated by a cryogenic pretreatment apparatus, and is rapidly desorbed by direct thermal high temperature desorption, and is quickly sent to a capillary column for separation. The separated low carbon (C2-C5) VOCs can be used as hydrogen samples. Flame ionization detector (FID) is used for detection; VOCs samples of high carbon (C6-C12), oxygenated, halogenated hydrocarbons, etc. are detected by mass spectrometry (MSD) to obtain accurate qualitative and quantitative determination of each single component. Analysis results.
