| Title: | A two-staged adsorption/thermal desorption GC/MS online system for monitoring volatile organic compounds |
| Author(s): | Wang W; Chen H; Zhu W; Gong Z; Yin H; Gao C; Zhu A; Wang D; |
| Address: | "School of Leisure Tourism, Chengdu Agricultural College, Chengdu, 611130, China. Biogeochemistry & Environmental Quality Research Group, Clemson University, Clemson, SC, 29442, USA. Sichuan Branch, Shimadzu (China) Co., LTD, Chengdu, 610031, China. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China. gongzhengjun@126.com. State-Province Joint Engineering Laboratory of Spatial Information Technology of High-Speed Rail Safety, Chengdu, 610756, China. gongzhengjun@126.com. Sichuan Shengshi Technology Co., LTD, Chengdu, 610031, China. Hebei Sailhero Environmental Protection High-Tech Co., LTD, Shijiazhuang, 050035, China. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China" |
| DOI: | 10.1007/s10661-023-11431-2 |
| ISSN/ISBN: | 1573-2959 (Electronic) 0167-6369 (Linking) |
| Abstract: | "Real-time online monitoring of volatile organic compounds (VOCs) in ambient air is crucial for timely and effective human health protection. Here, we developed an innovative, automated two-staged adsorption/thermal desorption gas chromatography/mass spectrometry (GC/MS) system for real-time online monitoring of 117 regulated volatile organic compounds (VOCs). This system comprised a sampling unit, water management trap, two-staged adsorption/thermal desorption unit, thermoelectric coolers (TECs), and a commercial GC/MS system. By implementing a micro-purge-and-trap (MP & T) step and a two-staged adsorption/thermal desorption unit, the presence of interfering substances was effectively minimized. The utilization of a heart-cutting GC, combined with a single MS detector, facilitated the precise separation and detection of 117 C(2)-C(12) VOCs, while circumventing the identification and coelution challenges commonly associated with traditional GC-FID or GC-FID/MS methods. The performance of our newly developed online system was meticulously optimized and evaluated using standard gas mixtures. Under optimal conditions, we achieved impressive results, with R(2) values >/= 0.9946 for the standard linear curves of all 117 VOCs, demonstrating a precision (RSD) ranging from 0.2% to 6.4%. When applied in the field monitoring, the concentration drifts for 10 ppbv standard gas mixtures were 0.01-5.64% within 24 h. Our study developed a system for online monitoring of 117 atmospheric VOCs with relatively high accuracy and robustness" |
| Keywords: | Humans *Volatile Organic Compounds/analysis Gas Chromatography-Mass Spectrometry/methods Adsorption Environmental Monitoring/methods Online Systems Gases/analysis Gc/ms Heart cutting Online monitoring Thermoelectric coolers Two-staged adsorption/thermal d; |
| Notes: | "MedlineWang, Wenjun Chen, Huan Zhu, Wei Gong, Zhengjun Yin, Hui Gao, Chao Zhu, Anni Wang, Dongmei eng No. 21777131 & No. 21677117/National Natural Science Foundation of China/ No. 2017GZ0388 & No. 2018GZ040/Science and Technology Department Foundation of Sichuan Province/ No.23ZR204/Institutional Research Fund of Chengdu Agricultural College/ Netherlands 2023/06/22 Environ Monit Assess. 2023 Jun 22; 195(7):869. doi: 10.1007/s10661-023-11431-2" |
