Portable Cryogenic Collection of Atmospheric Nitrous Oxide and Carbon Monoxide for High-Precision lsotopic Analysis

Amy K. Huff; Steven S. Cliff; Mark H. Thiemens

doi:10.1021/ac970256w

Portable Cryogenic Collection of Atmospheric Nitrous Oxide and Carbon Monoxide for High-Precision lsotopic Analysis

Amy K. Huff, Steven S. Cliff, Mark H. Thiemens

Meteorology and Atmospheric Science

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

A portable cryogenic collection system has been constructed for the isolation of atmospheric nitrous oxide (N₂O) and carbon monoxide (CO). Ambient air enters the system at a rate of 10 L/min, and N₂O condenses in a specially designed stainless steel ultrahigh-efficiency collection (UHEC) trap. The CO is next oxidized to CO₂ and removed by a second UHEC trap. In conjunction with drying agents, the UHEC traps remove greater than 99.9989% of atmospheric carbon dioxide (CO₂) that would otherwise interfere with CO-derived CO₂ analysis. The oxygen in the N₂O and CO-derived CO₂ samples is subsequently separated for high-precision mass spectroscopic analysis. This system is unique in that it provides for in situ collection and permits simultaneous measurement of the ¹⁸O/¹⁶O and ¹⁷O/¹⁶O ratios in N₂O and CO. Results are presented for a series of trials run to determine the ultimate collection efficiency of the UHEC cryogenic traps.

Original language	English (US)
Pages (from-to)	4267-4270
Number of pages	4
Journal	Analytical Chemistry
Volume	69
Issue number	20
DOIs	https://doi.org/10.1021/ac970256w
State	Published - Oct 15 1997

All Science Journal Classification (ASJC) codes

Analytical Chemistry

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10.1021/ac970256w

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title = "Portable Cryogenic Collection of Atmospheric Nitrous Oxide and Carbon Monoxide for High-Precision lsotopic Analysis",

abstract = "A portable cryogenic collection system has been constructed for the isolation of atmospheric nitrous oxide (N2O) and carbon monoxide (CO). Ambient air enters the system at a rate of 10 L/min, and N2O condenses in a specially designed stainless steel ultrahigh-efficiency collection (UHEC) trap. The CO is next oxidized to CO2 and removed by a second UHEC trap. In conjunction with drying agents, the UHEC traps remove greater than 99.9989% of atmospheric carbon dioxide (CO2) that would otherwise interfere with CO-derived CO2 analysis. The oxygen in the N2O and CO-derived CO2 samples is subsequently separated for high-precision mass spectroscopic analysis. This system is unique in that it provides for in situ collection and permits simultaneous measurement of the 18O/16O and 17O/16O ratios in N2O and CO. Results are presented for a series of trials run to determine the ultimate collection efficiency of the UHEC cryogenic traps.",

author = "Huff, {Amy K.} and Cliff, {Steven S.} and Thiemens, {Mark H.}",

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AU - Huff, Amy K.

AU - Cliff, Steven S.

AU - Thiemens, Mark H.

PY - 1997/10/15

Y1 - 1997/10/15

N2 - A portable cryogenic collection system has been constructed for the isolation of atmospheric nitrous oxide (N2O) and carbon monoxide (CO). Ambient air enters the system at a rate of 10 L/min, and N2O condenses in a specially designed stainless steel ultrahigh-efficiency collection (UHEC) trap. The CO is next oxidized to CO2 and removed by a second UHEC trap. In conjunction with drying agents, the UHEC traps remove greater than 99.9989% of atmospheric carbon dioxide (CO2) that would otherwise interfere with CO-derived CO2 analysis. The oxygen in the N2O and CO-derived CO2 samples is subsequently separated for high-precision mass spectroscopic analysis. This system is unique in that it provides for in situ collection and permits simultaneous measurement of the 18O/16O and 17O/16O ratios in N2O and CO. Results are presented for a series of trials run to determine the ultimate collection efficiency of the UHEC cryogenic traps.

AB - A portable cryogenic collection system has been constructed for the isolation of atmospheric nitrous oxide (N2O) and carbon monoxide (CO). Ambient air enters the system at a rate of 10 L/min, and N2O condenses in a specially designed stainless steel ultrahigh-efficiency collection (UHEC) trap. The CO is next oxidized to CO2 and removed by a second UHEC trap. In conjunction with drying agents, the UHEC traps remove greater than 99.9989% of atmospheric carbon dioxide (CO2) that would otherwise interfere with CO-derived CO2 analysis. The oxygen in the N2O and CO-derived CO2 samples is subsequently separated for high-precision mass spectroscopic analysis. This system is unique in that it provides for in situ collection and permits simultaneous measurement of the 18O/16O and 17O/16O ratios in N2O and CO. Results are presented for a series of trials run to determine the ultimate collection efficiency of the UHEC cryogenic traps.

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Portable Cryogenic Collection of Atmospheric Nitrous Oxide and Carbon Monoxide for High-Precision lsotopic Analysis

Abstract

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