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Monitoring gas concentrations in env...

Awtry, Andrew R.

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Monitoring gas concentrations in environmental and atmospheric applications using tunable diode lasers.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Monitoring gas concentrations in environmental and atmospheric applications using tunable diode lasers./
Author:	Awtry, Andrew R.
Description:	246 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1293.
Contained By:	Dissertation Abstracts International65-03B.
Subject:	Chemistry, Analytical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3124594
ISBN:	0496718988

Monitoring gas concentrations in environmental and atmospheric applications using tunable diode lasers.
Awtry, Andrew R.

Monitoring gas concentrations in environmental and atmospheric applications using tunable diode lasers. - 246 p.

Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1293.

Thesis (Ph.D.)--The George Washington University, 2004.

Two atmospheric chemistry processes that contribute to environmental concerns have been explored using mid-infrared, lead-salt diode lasers. Tunable diode laser absorption spectroscopy was used to determine concentrations of both NF3 and NH3. The focus of the NF3 research was to determine the magnitude of the nu1 absorption band in order to determine the effects of this molecule on global warming.

ISBN: 0496718988Subjects--Topical Terms:

586156
Chemistry, Analytical.

Monitoring gas concentrations in environmental and atmospheric applications using tunable diode lasers.
LDR:02387nmm 2200313 4500 001 1840309
005 20050721102956.5
008 130614s2004 eng d
020 $a 0496718988
035 $a (UnM)AAI3124594
035 $a AAI3124594
040 $a UnM $c UnM
100 1 $a Awtry, Andrew R. $3 1928649
245 1 0 $a Monitoring gas concentrations in environmental and atmospheric applications using tunable diode lasers.
300 $a 246 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1293.
500 $a Director: John Houston Miller.
502 $a Thesis (Ph.D.)--The George Washington University, 2004.
520 $a Two atmospheric chemistry processes that contribute to environmental concerns have been explored using mid-infrared, lead-salt diode lasers. Tunable diode laser absorption spectroscopy was used to determine concentrations of both NF3 and NH3. The focus of the NF3 research was to determine the magnitude of the nu1 absorption band in order to determine the effects of this molecule on global warming.
520 $a Deposition velocity is a proportionality constant between concentration and vertical flux to a surface. The magnitude of this constant for NH 3 depositing onto water is experimentally determined using both a small cell (425 mL) and a large chamber (335 L). The results from the chamber are then incorporated into a model in an attempt to better understand the atmospheric contribution to aqueous concentrations.
520 $a Near-infrared diode lasers were used in both integrated cavity output spectroscopy and cavity ringdown spectroscopy in an attempt to develop an air monitoring sensor. The following experiments were then performed determine the sensitivity, durability and dynamic range of these two techniques: flame characterization of HCN and C2H2 in a flame from a Wolfhard-Parker burner, obtaining isolated absorption features of CO, CO2, H 2O, HCN, NH3, CH4, and C2H4 in order to create calibration curves and determine detection limits, CO 2 classroom measurements, and CO2 isotope ratio measurements.
590 $a School code: 0075.
650 4 $a Chemistry, Analytical. $3 586156
650 4 $a Chemistry, Physical. $3 560527
650 4 $a Physics, Optics. $3 1018756
690 $a 0486
690 $a 0494
690 $a 0752
710 2 0 $a The George Washington University. $3 1017405
773 0 $t Dissertation Abstracts International $g 65-03B.
790 1 0 $a Miller, John Houston, $e advisor
790 $a 0075
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3124594