Online detection of VOCs in ambient air using gas chromatographyThe principle:
(1) The system can meet the online detection of VOCs in industrial parks, their factory boundaries, and fixed emission sources. The system collects the measured gas from the sampling pump to the FID detector for detection by laying pipelines. Online monitoring of non methane total hydrocarbons, benzene, toluene, xylene, etc. in gases, and customization based on VOC characteristic pollutants in different industries and working conditions.
(2) The analysis results are processed by analysis software to form spectra and analysis results, which are displayed on the screen and printer respectively, completing the detection and analysis process of a certain gas path.
(3) When multiple detections are required, the microcomputer automatically cycles according to the user's set detection sequence and number of detections, without manual intervention, achieving 24-hour continuous online detection and analysis, and all analysis data can be retained. In order for the staff to reuse the data.

Online detection of VOCs in ambient air using gas chromatographyExecution standards:

HJ/T604-2011 Determination of Total Hydrocarbons in Environmental Air Gas Chromatography Method
HJ/T38-1999 Determination of Non Methane Total Hydrocarbons in National Pollution Source Emissions Gas Chromatography Method
GB 16297-1996 Comprehensive Emission Standard for Air Pollutants
WS/T141-1999 Determination of Non Methane Total Hydrocarbons in Workplace Air by Gas Chromatography
GB/T 16157-1996 Determination of particulate matter and sampling methods for gaseous pollutants in exhaust gas from fixed pollution sources
Monitoring and Analysis Methods for Air and Waste Gas, Fourth Edition (pg.585) - Total Hydrocarbons and Non Methane Total Hydrocarbons

Main features:
1. The box adopts an integrated cabinet structure with metal sheet upright.
2. By using the Windows control system on the computer, the operation is simple and easy to learn. There is no limit to the number of database records, and historical data can be analyzed and compared. The Modbus/TCP server built into the workstation can connect the analysis results to DCS (Distributed Control System).
3. Sampling can be done under positive or negative pressure. The system is programmed to automatically sample periodically and continuously monitor and calibrate the process sample gas without the need for manual verification. In areas where pipelines have not been laid, manual sampling and testing can also be used, which is flexible, convenient, and reliable. The maximum sampling distance of the pipeline is no more than 5 kilometers, and the software controls 48 channels.
4. Injection method: supports packed column and capillary column injectors; Can be equipped with 4-way, 6-way, 10 way, and 12 way valves for sample injection; Multiple gas components are injected at the same time to produce results.
5. Detection methods: Multiple detector options are available, such as FID, TCD, ECD, FPD, NPD, PID, and PDHID.
6. Running time: 24-hour automatic cycle monitoring or manually set.
7. System error: ≤ 1.5%.

Application scope:
Applied to industries such as oil refining and petrochemicals, surface coating, textile printing and dyeing, printing and packaging, footwear, rubber and plastic products, synthetic leather, chemical fiber, artificial board manufacturing, furniture manufacturing, electronic component manufacturing, life service industry, industrial parks and their factory boundaries, and online monitoring of VOCs from fixed emission sources.