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| Development of a New Rapid Detection System for Trace Components in Indoor Air of Passenger Vehicles |
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| DOI： |
| KeyWord:passenger vehicles indoor air trace components of VOCs rapid detection |
| Author | Institution |
| YAN Zhi-qi，WANG Jie，WANG Hui，WANG Fu-hua，ZHANG Li-jun，TAN Yin-xiang，WU Ri-wei，HUANG Wen-jie，HUANG Zao-tian，TAN Guo-bin |
1. Guangzhou Hexin Instrument Co.，Ltd.，Guangzhou ，China; 2. Guang Wu Automobile Co.，Ltd.，Guangzhou ，China |
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| Abstract: |
| A novel and rapid detection system for trace components in indoor air of passenger vehicles was developed，based on the independently developed vacuum ultraviolet single photon ionization time-of-flight mass spectrometer and on-line high precision formaldehyde analyzer．Firstly，the indoor air of passenger vehicles was replaced by purified air，then the trace components of volatile organic compounds in indoor air of passenger vehicles were continuously detected with volatile organic compounds online mass spectrometer，while the formaldehyde in indoor air of passenger vehicles was continuously detected by using an online high precision formaldehyde analyzer．The results indicated that benzene，toluene，xylene/ethylbenzene，styrene and formaldehyde exhibited good linearity in the corresponding concentration ranges，with their correlation coefficients（r2） all greater than 0.99，and relative standard deviations less than 5%．The limits of detection were 1.3 × 10-9，0.1 × 10-9，0.2 × 10-9，0.8 × 10-9 and 0.1 × 10-9 mol/mol，respectively．This method was applied to determine the indoor air of passenger vehicles．The results showed that the VOCs in indoor air of passenger vehicles could be released quickly to reach a sub-equilibrium state in a short time，and the results of VOCs concentration and release rate under the sub-equilibrium state could be obtained．The concentrations of benzene，toluene，xylene/ethylbenzene，styrene and formaldehyde in indoor air of the tested vehicle were 0.30，8.90，25.10，21.90 and 15.05 μg/m3，respectively．With no complex and time-consuming sampling process and easy to operate，this proposed method could meet the requirements for rapid detection and screening on the trace components in indoor air of passenger vehicles. |
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