Benzene derivatives generally refer to benzene and its derivatives, mainly including aromatic hydrocarbons such as benzene, toluene, ethylbenzene, and xylene. These substances are mostly colorless, transparent, volatile liquids at room temperature, insoluble in water but soluble in organic solvents, toxic, and have a special aromatic odor.
In indoor air quality testing, the detection of benzene derivatives generally includes benzene, toluene, and xylene. Among them, benzene is highly toxic and is one of the carcinogens with strong toxicity to the human body.
The Qingdao Environmental Control PB-350 \ PB-500 series products can be used for portable detection and online monitoring of benzene based substances in areas such as disease control and hygiene, indoor air, and industry.
Portable gas chromatography method
The new version of GB/T18883-2022 "Indoor Air Quality Standards" was officially released on July 11, 2022 and will be implemented on February 1, 2023. The new standard has put forward some new requirements for the detection of volatile organic compounds.
1： The new standard adds two parameters, trichloroethylene and tetrachloroethylene, proposes limit requirements, and reduces the concentration limit of benzene.
The Qingdao environmental control equipment PB-350 portable gas chromatography analyzer can not only detect the original benzene, toluene, and xylene in the standard, but also simultaneously detect trichloroethylene and tetrachloroethylene proposed in the new standard.
2： The new standard has replaced Appendix B with Appendix C for the inspection method of benzene derivatives in indoor air.
The Qingdao Environmental Control PB-350 portable gas chromatography analyzer complies with the C.3 portable gas chromatography method in the new standard.
In addition to meeting the requirements in terms of working principle, calibration, analysis, etc., the instrument can outperform the standard requirements in terms of detection limit, lower limit of determination, measurement range, etc.
Online gas chromatography method
The PB-500 online benzene series analyzer is a specialized on-site analyzer for monitoring benzene, toluene, ethylbenzene, and xylene in ambient air. It can be widely used in industrial monitoring, environmental air quality monitoring, small air quantitative monitoring, indoor air quantitative monitoring, and other fields.
The MEMS technology pre concentration unit and GC separation unit adopt microelectromechanical technology (MEMS), based on proprietary technology - silicon micro mechanical chips and small detectors, which can qualitatively and quantitatively analyze target compounds. The core part of the instrument can be integrated into other analytical systems.
PB-350 portable gas chromatograph and PB-500 online benzene series monitoring instrument can be used for monitoring in disease control centers, monitoring of hazardous factors in public places, industrial monitoring, and other fields. In addition, customized solutions can be provided according to customer needs.
