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Chen H, Hu R, Xie P, Xing X, Ling L, Li Z, Wang F, Wang Y, Liu J, Liu W. A hydroxyl radical detection system using gas expansion and fast gating laser-induced fluorescence techniques. J Environ Sci (China) 2018; 65:190-200. [PMID: 29548391 DOI: 10.1016/j.jes.2017.03.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/17/2017] [Accepted: 03/10/2017] [Indexed: 06/08/2023]
Abstract
An OH radical measurement instrument based on Fluorescence Assay by Gas Expansion (FAGE) has been developed in our laboratory. Ambient air is introduced into a low-pressure fluorescence cell through a pinhole aperture and irradiated by a dye laser at a high repetition rate of 8.5kHz. The OH radical is both excited and detected at 308nm using A-X(0,0) band. To satisfy the high efficiency needs of fluorescence collection and detection, a 4-lens optical system and a self-designed gated photomultiplier (PMT) is used, and gating is actualized by switching the voltage applied on the PMT dynodes. A micro channel photomultiplier (MCP) is also prepared for fluorescence detection. Then the weak signal is accumulated by a photon counter in a specific timing. The OH radical excitation spectrum range in the wavelength of 307.82-308.2nm is detected and the excited line for OH detection is determined to be Q1(2) line. The calibration of the FAGE system is researched by using simultaneous photolysis of H2O and O2. The minimum detection limit of the instrument using gated PMT is determined to be 9.4×105molecules/cm3, and the sensitivity is 9.5×10-7cps/(OH·cm-3), with a signal-to-noise ratio of 2 and an integration time of 60sec, while OH detection limit and the detection sensitivity using MCP is calculated to be 1.6×105molecules/cm3 and 2.3×10-6cps/(OH·cm-3). The laboratory OH radical measurement is carried out and results show that the proposed system can be used for atmospheric OH radical measurement.
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Affiliation(s)
- Hao Chen
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China; Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
| | - Renzhi Hu
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
| | - Pinhua Xie
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; CAS Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361000, China.
| | - Xingbiao Xing
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - Liuyi Ling
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; Institute of Electric and Information Technology, Anhui University of Science and Technology, Huainan 232001, China
| | - Zhiyan Li
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - Fengyang Wang
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - Yihui Wang
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - Jianguo Liu
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - Wenqing Liu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China; Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
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Gligorovski S, Strekowski R, Barbati S, Vione D. Environmental Implications of Hydroxyl Radicals (•OH). Chem Rev 2015; 115:13051-92. [DOI: 10.1021/cr500310b] [Citation(s) in RCA: 737] [Impact Index Per Article: 81.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sasho Gligorovski
- Aix-Marseille
Université, CNRS, LCE UMR 7376, 13331 Marseilles, France
| | - Rafal Strekowski
- Aix-Marseille
Université, CNRS, LCE UMR 7376, 13331 Marseilles, France
| | - Stephane Barbati
- Aix-Marseille
Université, CNRS, LCE UMR 7376, 13331 Marseilles, France
| | - Davide Vione
- Dipartimento
di Chimica, Università di Torino, Via P. Giuria 5, 10125 Torino, Italy
- Centro
Interdipartimentale NatRisk, Università di Torino, Via L. Da
Vinci 44, 10095 Grugliasco, Italy
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Sprengnether MM, Demerjian KL, Dransfield TJ, Clarke JS, Anderson JG, Donahue NM. Rate Constants of Nine C6−C9 Alkanes with OH from 230 to 379 K: Chemical Tracers for [OH]. J Phys Chem A 2009; 113:5030-8. [DOI: 10.1021/jp810412m] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Timothy J. Dransfield
- Department of Chemistry, University of Massachusetts, 100 Morrissey Blvd., Boston, Massachusetts, 02125
| | | | | | - Neil M. Donahue
- Center for Atmospheric Particle Studies, Doherty Hall B204, Carnegie Mellon University, Pittsburgh, Pennsylvania, 15213
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Affiliation(s)
- Dwayne E Heard
- Department of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
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