| 项目编号: | 1531284
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| 项目名称: | MRI: Acquisition of CI-API-TOFMS (Chemical Ionization Atmospheric Pressure Interface Time-of-Flight Mass Spectrometer) to Measure Condensible Vapors Associated with Fine Particles |
| 作者: | Neil Donahue
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| 承担单位: | Carnegie-Mellon University
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| 批准年: | 2014
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| 开始日期: | 2015-08-15
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| 结束日期: | 2018-07-31
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| 资助金额: | USD439950
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
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| 英文关键词: | ci-apci-tofms
; policy decision
; further chemical transformation
; ci-api-tofms datum
; particle mass
; atmospheric fine particle organic aerosol
; shared facility
; gas-phase chemical ionization atmospheric pressure interface time-of flight-mass spectrometry
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| 英文摘要: | Atmospheric fine particle organic aerosol (OA) is a known factor in human respiratory and cardio-vascular health and is also a source of uncertainty in climate change, though direct and indirect effects. It is also known that a very large fraction (80-90%) of the submicron (PM1) particle mass arrives via condensation, and that OA evolves to that state in a dynamic cycle of oxidation, condensation, evaporation, and further chemical transformation. A factor limiting our understanding of the reaction paths is that many of these compounds are extremely sticky (surface active), presenting a challenge to their handling and subsequent analysis. Recently developed instrumentation, specifically gas-phase chemical ionization atmospheric pressure interface time-of flight-mass spectrometry (CI-APCI-TOFMS), offers the promise of dynamically analyzing, both in laboratory and field studies, condensable organic compounds before they either reach particle size, and after they react and volatilize.
The instrument will be deployed principally in the Carnegie Mellon (CMU) Air Quality Laboratory to support organic aerosol research experiments. The lab is a shared facility run by a team of CMU investigators with an established history of collaborative research and equipment sharing. The instrument is also field-deployable by design, allowing improved research into new aerosol particle formation. CI-API-TOFMS data may thus inform local, state and national regulatory and policy decisions, ultimately to the public benefit. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93706
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Neil Donahue. MRI: Acquisition of CI-API-TOFMS (Chemical Ionization Atmospheric Pressure Interface Time-of-Flight Mass Spectrometer) to Measure Condensible Vapors Associated with Fine Particles. 2014-01-01.
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