Extractive FTIR spectroscopy with cryogen-free low-temperature inert preconcentration for autonomous measurements of atmospheric organics: 1: Instrument development and preliminary performance

In collaboration with the Jefferson County Department of Health and the Environmental Protection Agency (EPA), the University of Alabama in Huntsville developed a novel sensor for detecting very low levels of volatile organic compounds (VOCs). This sensor uses a commercial Fourier-transform infrared...

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Bibliographic Details
Published in:Applied optics (2004) 2015-04, Vol.54 (10), p.2908-2921
Main Authors: Buckley, Patrick I, Bowdle, David A, Newchurch, M J, Sive, Barkley C, Mount, George H
Format: Article
Language:English
Subjects:
Acrolein - chemistry
Air Pollutants - analysis
Alabama
Algorithms
Atmosphere
Atmospherics
Autonomous
Calibration
Chromatography, Gas
Environment protection
Environmental Monitoring - instrumentation
Equipment Design
Infrared spectroscopy
Monitoring
Optical Phenomena
Quality Control
Sensors
Software
Spectrometers
Spectrophotometry - methods
Spectroscopy, Fourier Transform Infrared - methods
Temperature
Volatile organic compounds
Volatile Organic Compounds - chemistry
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Summary:In collaboration with the Jefferson County Department of Health and the Environmental Protection Agency (EPA), the University of Alabama in Huntsville developed a novel sensor for detecting very low levels of volatile organic compounds (VOCs). This sensor uses a commercial Fourier-transform infrared (FTIR) spectrometer, a commercial long-path IR gas cell, a commercial acoustic Stirling cyrocooler, and a custom cryogen-free cryotrap to improve sensitivity in an autonomous system with on-board quality control and quality assurance. Laboratory and initial field results show this methodology is sensitive to and well-suited for a wide variety of VOC atmospheric research and monitoring applications, including EPA National Air Toxics Trends Stations and the National Core monitoring network.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.54.002908