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Wang W, Chen H, Zhu W, Gong Z, Yin H, Gao C, Zhu A, Wang D. A two-staged adsorption/thermal desorption GC/MS online system for monitoring volatile organic compounds. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:869. [PMID: 37347444 DOI: 10.1007/s10661-023-11431-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 05/27/2023] [Indexed: 06/23/2023]
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 C2-C12 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 R2 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.
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Affiliation(s)
- Wenjun Wang
- School of Leisure Tourism, Chengdu Agricultural College, Chengdu, 611130, China
| | - Huan Chen
- Biogeochemistry & Environmental Quality Research Group, Clemson University, Clemson, SC, 29442, USA
| | - Wei Zhu
- Sichuan Branch, Shimadzu (China) Co., LTD, Chengdu, 610031, China
| | - Zhengjun Gong
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China.
- State-Province Joint Engineering Laboratory of Spatial Information Technology of High-Speed Rail Safety, Chengdu, 610756, China.
| | - Hui Yin
- Sichuan Shengshi Technology Co., LTD, Chengdu, 610031, China
| | - Chao Gao
- Hebei Sailhero Environmental Protection High-Tech Co., LTD, Shijiazhuang, 050035, China
| | - Anni Zhu
- School of Leisure Tourism, Chengdu Agricultural College, Chengdu, 611130, China
| | - Dongmei Wang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China
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Shi Z, Zhang J, Zeng W, Zhou Q. Adsorption and Sensing Performances of MoTe 2 Monolayers Doped with Pd, Ni, and Pt for SO 2 and NH 3: A DFT Investigation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:4125-4139. [PMID: 36883815 DOI: 10.1021/acs.langmuir.3c00030] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Density functional theory (DFT) calculation was used to study the adsorption and sensing performances of a transition metal atom (TMA) doped MoTe2 monolayer for two industrial toxic and harmful gases, SO2 and NH3, in this study. The adsorption structure, molecular orbital, density of state, charge transfer, and energy band structure were applied to investigate the interaction between the gas and MoTe2 monolayer substrate. The conductivity of the MoTe2 monolayer film doped with TMA (Ni, Pt, Pd) is significantly improved. The original MoTe2 monolayer has poor adsorptive ability for SO2 and NH3, which is physisorption, while for the TMA-doped MoTe2 monolayer, it is significantly enhanced and the adsorption process is chemisorption. All results provide a trustworthy theoretical basis for sensors based on MoTe2 to detect toxic and harmful gases SO2 and NH3. Additionally, it also provides guidance for further research on the transition metal cluster doped MoTe2 monolayer for gas detection.
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Affiliation(s)
- Zhaoyin Shi
- College of Engineering and Technology, Southwest University, Chongqing 400715, China
| | - Jiaqi Zhang
- College of Engineering and Technology, Southwest University, Chongqing 400715, China
| | - Wen Zeng
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Qu Zhou
- College of Engineering and Technology, Southwest University, Chongqing 400715, China
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Basharnavaz H, Habibi-Yangjeh A, Pirhashemi M. Graphitic carbon nitride as a fascinating adsorbent for toxic gases: A mini-review. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137676] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ou-Yang CF, Lin TL, Chang CC, Hsieh HC, Wang CH, Wang JL. Characterization of industrial plumes of volatile organic compounds by guided sampling. CHEMOSPHERE 2020; 241:124957. [PMID: 31590021 DOI: 10.1016/j.chemosphere.2019.124957] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/18/2019] [Accepted: 09/23/2019] [Indexed: 06/10/2023]
Abstract
Instead of manual sampling in a random way near a source area, this study used trigger sampling guided by an analyzer at a fixed site near a refinery plant to obtain the chemical composition of volatile organic compounds (VOCs) representative of the source. The analyzer was built in-house to measure total VOC (TVOC) levels by subtracting methane from total combustible organic compounds (TOC) with flame ionization detection. The analyzer with minute resolution provided instantaneous measurements of TVOCs to trigger canister sampling at the moments of VOC plumes in a source area. The chemical composition of the 13 trigger samples were compared with the other non-trigger samples randomly collected either within the refinery or on an urban street. All samples were analyzed by gas chromatography-mass spectrometry/flame ionization detection (GC-MS/FID) for detailed speciation. High agreement in total VOC abundance between the analyzer and GC-MS/FID indicates internal consistency of the two techniques and the robustness of the TVOC analyzer to guide sampling of VOC plumes. The trigger samples showing very high consistency in the overall composition imply that sampling at the right moments of plume arrivals can facilitate characterization of the source profiles, which can hardly be achieved by random sampling. The coupling of the fast-and-slow analytical techniques to guide sampling is proven to be an effective means to probe source characteristics.
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Affiliation(s)
- Chang-Feng Ou-Yang
- Department of Atmospheric Sciences, National Central University, Taoyuan, 32001, Taiwan
| | - Tien-Li Lin
- Department of Chemistry, National Central University, Taoyuan, 32001, Taiwan
| | - Chih-Chung Chang
- Research Center for Environmental Changes, Academia Sinica, Taipei, 11529, Taiwan
| | - Hsin-Cheng Hsieh
- Department of Chemistry, National Central University, Taoyuan, 32001, Taiwan
| | - Chieh-Heng Wang
- Center for Environmental Studies, National Central University, Taoyuan, 32001, Taiwan.
| | - Jia-Lin Wang
- Department of Chemistry, National Central University, Taoyuan, 32001, Taiwan.
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Zaboli M, Raissi H. DFT and MD study of adsorption sensitivity of aluminium phosphide nanotube towards some air pollutant gas molecules. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1295453] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Maryam Zaboli
- Department of Chemistry, University of Birjand, Birjand, Iran
| | - Heidar Raissi
- Department of Chemistry, University of Birjand, Birjand, Iran
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Gebicki J, Byliński H, Namieśnik J. Measurement techniques for assessing the olfactory impact of municipal sewage treatment plants. ENVIRONMENTAL MONITORING AND ASSESSMENT 2016; 188:32. [PMID: 26670041 PMCID: PMC4679812 DOI: 10.1007/s10661-015-5024-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 12/02/2015] [Indexed: 06/05/2023]
Abstract
The study presents information about the measurement techniques used for the assessment of air quality in terms of the olfactory intensity resulting from the operation of municipal sewage treatment plants. Advantages and disadvantages of the measurement techniques used are presented. Sources of malodourous substance emission from sewage treatment plants were described, and the malodourous substances emitted were characterised. Trends in development of analysis and monitoring of the malodourous substances in the air were also presented.
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Affiliation(s)
- Jacek Gebicki
- Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Narutowicza 11/12 Street, 80-233, Gdansk, Poland.
| | - Hubert Byliński
- Department of Analytical Chemistry, Chemical Faculty, Gdansk University of Technology, Narutowicza 11/12 Street, 80-233, Gdansk, Poland
| | - Jacek Namieśnik
- Department of Analytical Chemistry, Chemical Faculty, Gdansk University of Technology, Narutowicza 11/12 Street, 80-233, Gdansk, Poland
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Harmful gas recognition exploiting a CTL sensor array. SENSORS 2013; 13:13509-20. [PMID: 24113681 PMCID: PMC3859075 DOI: 10.3390/s131013509] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 09/04/2013] [Accepted: 09/18/2013] [Indexed: 11/17/2022]
Abstract
In this paper, a novel cataluminescence (CTL)-based sensor array consisting of nine types of catalytic materials is developed for the recognition of several harmful gases, namely carbon monoxide, acetone, chloroform and toluene. First, the experimental setup is constructed by using sensing nanomaterials, a heating plate, a pneumatic pump, a gas flow meter, a digital temperature device, a camera and a BPCL Ultra Weak Chemiluminescence Analyzer. Then, unique CTL patterns for the four types of harmful gas are obtained from the sensor array. The harmful gases are successful recognized by the PCA method. The optimal conditions are also investigated. Finally, experimental results show high sensitivity, long-term stability and good linearity of the sensor array, which combined with simplicity, make our system a promising application in this field.
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Jansen RMC, Wildt J, Kappers IF, Bouwmeester HJ, Hofstee JW, van Henten EJ. Detection of diseased plants by analysis of volatile organic compound emission. ANNUAL REVIEW OF PHYTOPATHOLOGY 2011; 49:157-74. [PMID: 21663436 DOI: 10.1146/annurev-phyto-072910-095227] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
This review focuses on the detection of diseased plants by analysis of volatile organic compound (VOC) emissions. It includes an overview of studies that report on the impact of infectious and noninfectious diseases on these emissions and discusses the specificity of disease-induced emissions. The review also provides an overview of processes that affect the gas balance of plant volatiles, including their loss processes. These processes are considered as important because they contribute to the time-dynamic concentration profiles of plant-emitted volatiles. In addition, we describe the most popular techniques currently in use to measure volatiles emitted from plants, with emphasis on agricultural application. Dynamic sampling coupled with gas chromatography and followed by an appropriate detector is considered as the most appropriate method for application in agriculture. It is recommended to evaluate the state-of-the-art in the fields concerned with this method and to explore the development of a new instrument based on the specific needs for application in agricultural practice. However, to apply such an instrument in agriculture remains a challenge, mainly due to high costs.
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Affiliation(s)
- R M C Jansen
- Wageningen University, Farm Technology Group, 6700 AA, Wageningen, The Netherlands.
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Pandey SK, Kim KH. Comparative analysis of odorous volatile organic compounds between direct injection and solid-phase microextraction: Development and validation of a gas chromatography–mass spectrometry-based methodology. J Chromatogr A 2009; 1216:5436-44. [DOI: 10.1016/j.chroma.2009.05.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2009] [Revised: 05/05/2009] [Accepted: 05/12/2009] [Indexed: 10/20/2022]
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