Applications of Cavity Ring‐Down Spectroscopy in Atmospheric Chemistry

Hancock, Gus; Orr‐Ewing, Andrew J.

doi:10.1002/9781444308259.ch7

Cited by 6 publications

(2 citation statements)

References 61 publications

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“…As well as returning high-resolution mole fraction measurements (Crosson, 2008), CRDS is used for stable isotope analysis of CO 2 , CH 4 , H 2 O, and N 2 O (Crosson et al, 2002;Dahnke et al, 2001;Kerstel et al, 2006;Sigrist et al, 2008). Commercial deployment of CRDS has created novel analytical possibilities with greater stability, precision, instrument portability, and a lower cost basis compared with many traditional spectroscopic, chromatographic, and mass spectrometric techniques (Berryman et al, 2011;Hancock and Orr-Ewing, 2010;Mürtz and Hering, 2010;Picarro, 2009). Crosson et al (2002) provide a description of the working principles for taking isotopic measurements by CRDS.…”

Section: Introductionmentioning

confidence: 99%

System for δ13C-CO2 and xCO2 analysis of discrete gas samples by cavity ring-down spectroscopy

Dickinson¹,

Bodé²,

Boeckx³

2017

Preprint

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Abstract. A method was devised for analysing small discrete gas samples (50 ml syringe) by cavity ring-down spectroscopy (CRDS). Measurements were accomplished by inletting 50 ml syringed samples into an isotopic-CO2 CRDS analyser (Picarro G2131-i) between baseline readings of a standard reference air, which produced sharp peaks in the CRDS data feed. A custom software script was developed to systematise measures and aggregate sample data. The method was successfully tested with CO2 mole fractions (xCO2) ranging from 20 000 ppm and δ13C-CO2 values from natural abundance up to +30 000 ‰. Throughput was typically 8 to 10 samples h−1, with 12 h−1 possible under ideal conditions. The measurement failure rate in routine use was ca. 1 %. Calibration to correct for memory effects was performed with gravimetric gas standards ranging from 0.05 to 2109 ppm xCO2 and δ13C-CO2 levels varying from −27.3 to +21 740 ‰. Repeatability tests demonstrated that method precision for 50 ml samples was ca. 0.05 % in xCO2 and 0.15 ‰ in δ13C-CO2 for normal atmospheric CO2 compositions. Long-term method consistency was tested over a 9-month period, with results showing no systematic measurement drift over time. Standardised analysis of discrete gas samples expands the scope of applications for isotopic-CO2 CRDS and enhances its potential for replacing conventional isotope ratio measurement techniques. Our method involves minimal setup costs and can be readily implemented in Picarro G2131-i and G2201-i analysers or tailored for use with other CRDS instruments and trace-gases.

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Section: Introductionmentioning

confidence: 99%

System for δ13C-CO2 and xCO2 analysis of discrete gas samples by cavity ring-down spectroscopy

Dickinson¹,

Bodé²,

Boeckx³

2017

Preprint

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“…Promoted by these theoretical and experimental advances, OSD is today of broad interest. Overtone spectroscopy is useful to analytical chemistry, 114,115 used for field detection [116][117][118][119][120] and has been applied to He nanodroplets. 121,122 In addition to supporting reaction dynamics (see some of the review papers previously listed), overtone excitation is also important in atmospheric chemistry, [123][124][125] essential in bond selected chemistry, 15,16 and relevant to laser crystals and glasses.…”

Section: Introductionmentioning

confidence: 99%

Molecular spectroscopy and dynamics: a polyad-based perspective

Herman

Perry

2013

Phys. Chem. Chem. Phys.

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The efficiency and insight of global, polyad-based modeling in overtone spectroscopy and dynamics is demonstrated. Both vibration and vibration-rotation polyads are considered. The spectroscopic implications of polyad Hamiltonians derive from their ability to account for the detailed line positions and intensities of spectral features and their unique predictive power. The dynamical implications of polyad Hamiltonians include classical bifurcations that lead to the birth of new vibrational modes and intramolecular vibrational-rotational energy redistribution over multiple timescales. The literature is reviewed, with emphasis on acetylene results.

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2013

Airborne Measurements for Environmental Research

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Applications of Cavity Ring‐Down Spectroscopy in Atmospheric Chemistry

Cited by 6 publications

References 61 publications

System for δ<sup>13</sup>C-CO<sub>2</sub> and <i>x</i>CO<sub>2</sub> analysis of discrete gas samples by cavity ring-down spectroscopy

System for δ<sup>13</sup>C-CO<sub>2</sub> and <i>x</i>CO<sub>2</sub> analysis of discrete gas samples by cavity ring-down spectroscopy

Molecular spectroscopy and dynamics: a polyad-based perspective

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Applications of Cavity Ring‐Down Spectroscopy in Atmospheric Chemistry

Cited by 6 publications

References 61 publications

System for δ&lt;sup&gt;13&lt;/sup&gt;C-CO&lt;sub&gt;2&lt;/sub&gt; and &lt;i&gt;x&lt;/i&gt;CO&lt;sub&gt;2&lt;/sub&gt; analysis of discrete gas samples by cavity ring-down spectroscopy

System for δ&lt;sup&gt;13&lt;/sup&gt;C-CO&lt;sub&gt;2&lt;/sub&gt; and &lt;i&gt;x&lt;/i&gt;CO&lt;sub&gt;2&lt;/sub&gt; analysis of discrete gas samples by cavity ring-down spectroscopy

Molecular spectroscopy and dynamics: a polyad-based perspective

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System for δ<sup>13</sup>C-CO<sub>2</sub> and <i>x</i>CO<sub>2</sub> analysis of discrete gas samples by cavity ring-down spectroscopy

System for δ<sup>13</sup>C-CO<sub>2</sub> and <i>x</i>CO<sub>2</sub> analysis of discrete gas samples by cavity ring-down spectroscopy