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Verification of nitrous oxide primary standard gas mixtures by gas chromatography and cavity ring-down spectroscopy for ambient measurements in South Africa

  • Silindile Lushozi
  • James TshilongoEmail author
  • Luke Chimuka
General Paper
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Abstract

Nitrous oxide (N2O) is an important greenhouse gas and is the third-largest contributor to global warming with a global warming potential (GWP) higher than that of carbon dioxide. Ambient N2O is monitored globally and described at nanomole per mole (nmol mol−1) levels. Metrologically traceable and highly accurate N2O gas standards are required to understand the behaviour of the greenhouse gases in the atmosphere and GWP. A group of primary standard gas mixtures (PSGMs) in aluminium cylinder material has been prepared in synthetic air for the calibration of analytical instruments for measurement of N2O at an ambient level. An automatic weighing system with a mass comparator and a fully automated circular rotary plate, as well as a gas filling station, was used in the preparation of the gas mixtures. Analytical methods such as gas chromatography coupled with micro-electron capture detector and cavity ring-down spectroscopy were adopted in the verification process. Four PSGMs in the final preparation step were used to analyse unknown background and filtered air samples at the ambient level. An expanded uncertainty relative to the gravimetric amount fraction was found to be 0.02 %. Results show that the background air samples lie within the calibration range with 329 to 330 nmol mol−1 obtained and 135 nmol mol−1 obtained for filtered air sample.

Keywords

Primary standard gas mixtures Gas chromatography coupled with a micro-electron detector Cavity ring-down spectroscopy Background Filtered air samples 

Notes

Acknowledgements

This work was supported by the National Metrology Institute of South Africa cross-cutting project: Environmental monitoring (Environmental and ambient air gases) under the green economy for measurement technology. The authors would like to thank the National Research Foundation (NRF) for their Grant provided during the Ph.D. studies and the gas analysis team for their contributions made. Many thanks go to the staff of SAWS-GAW station in Cape Point for providing background air samples.

Supplementary material

769_2019_1375_MOESM1_ESM.docx (1.1 mb)
Supplementary material 1 (DOCX 1131 kb)

References

  1. 1.
    Climate Change (2013) The physical science basis, contribution of working group I to the fifth assessment report of the IPCC. In: Stocker TF, Qin D, Plattner GK, Tignor M, Allen SK, Boschung J, Nauels A, Xia Y, Bex V and Midgley PM (eds) Cambridge University Press, New York, p 1535Google Scholar
  2. 2.
    Becker KH, Kurtenbach R, Wiesen P, Jensen TE, Wallington TJ (1999) Nitrous oxide (N2O) emissions from vehicles. Environ Sci Technol 33:4134–4139CrossRefGoogle Scholar
  3. 3.
    World Meteorological Organization (2011) Guide to climatological practices (WMO-No.100). GenevaGoogle Scholar
  4. 4.
    Santoni GW, Daube BC, Kort EA, Jimenez R, Park S, Pittman JV, Gottlieb E, Xiang B, Zahniser MS, Nelson DD, McManus JB, Peischl J, Ryerson TB, Holloway JS, Andrews AE, Sweeney C, Hall B, Hinsta EJ, Moore FL, Elkins JW, Hurst DF, Stephens BB, Bent J, Wofsy SC (2014) Evaluation of airborne quantum cascade laser spectrometer (QCLS) measurements of the carbon and greenhouse gas suite—CO2, CH4, N2O, and CO—during the CalNex and HIPPO campaigns. Atmos Meas Tech 7:1509–1526CrossRefGoogle Scholar
  5. 5.
    Hara K, Rahman M (2013) Measurement of automobile exhaust N2O by mid-IR laser spectroscopy. Readout (Technical report of HORIBA) 40:38–41Google Scholar
  6. 6.
    Kelley ME, Rhoderick GC, Guenther FR (2014) Development and verification of air balance gas primary standards for the measurement of nitrous oxide at atmospheric levels. Anal Chem 86:4544–4549CrossRefGoogle Scholar
  7. 7.
    Lee J, Moon D, Kim JS, Wessel R, Aoki N, Kato K, Guenther F, Rhoderick G, Konopelko LA, Hall B (2011) Final report on international comparison CCQM-K68: nitrous oxide in synthetic air (330 nmol mol−1). Metrologia 48(Tech Suppl):08004CrossRefGoogle Scholar
  8. 8.
    Hall BD, Dutton GS, Elkins JW (2007) The NOAA nitrous oxide standard scale for atmospheric observations. Geophys Res 112:D09305.  https://doi.org/10.1029/2006JD007954 CrossRefGoogle Scholar
  9. 9.
  10. 10.
    ISO 6142-1 (2015) Gas analysis—preparation of calibration gas mixtures—gravimetric methods for Class 1 mixtures. International Organization for Standardization, GenevaGoogle Scholar
  11. 11.
    Lim J, Park M, Lee J, Lee J (2017) Validation of spectroscopic gas analyser accuracy using gravimetric standard gas mixtures: impact of background gas composition on CO2 quantitation by cavity ring-down spectroscopy. Atmos Meas Tech 10:4613–4621CrossRefGoogle Scholar
  12. 12.
    ISO 6143 (2001) Gas analysis—comparison methods for determining and checking the composition of calibration gas mixtures. International Organization for Standardization, GenevaGoogle Scholar
  13. 13.
    Kim ME, Kang JH, Kim YD, Lee DS, Lee S (2018) Development of accurate dimethyl sulphide standard gas mixtures at low nanomole per mole levels in high-pressure aluminium cylinder for ambient measurements. Metrologia 55:158–166CrossRefGoogle Scholar
  14. 14.
    Chen H (2013) Long-term stability of calibration gases in cylinders for CO2, CH4, CO, N2O, and SF6. In: 17th WMO (IAEA meeting on carbon dioxide, other greenhouse gases and related measurement techniques (GGMT-2013), edited by: WMO/IAEA, Chinese Meteorological Administration, Beijing, ChinaGoogle Scholar
  15. 15.
    Chen H, Winderlich J, Gerbig C, Hoefer A, Rella CW, Crosson ER, van Pelt AD, Steinbach J, Kolle O, Beck V, Daube BC, Gottlieb EW, Chow VY, Santoni GW, Wofsy SC (2010) High-accuracy continuous airborne measurements of greenhouse gases (CO2 and CH4) using the cavity ring-down spectroscopy (CRDS) technique. Atmos Meas Tech 3:375–386CrossRefGoogle Scholar
  16. 16.
    van der Laan S, Neubert REM, Meijer HAJ (2009) A single gas chromatograph for accurate atmospheric mixing ratio measurements of CO2, CH4, N2O, SF6 and CO. Atmos Meas Tech 2:549–559CrossRefGoogle Scholar
  17. 17.
    Zhou J, Hoffnagle J, Tan S, Dong F, Fleck D, Yiu J, Huang K, Leggett G, He Y (2016) Development of a high precision and stability ambient N2O and CO analyzer. Geophys Res Abstr 18:EGU2016-10659Google Scholar
  18. 18.
  19. 19.
    Oh SH, Kim BM, Dong MM, Kim JS (2001) Comparison of the sulfur dioxide primary standard gases of NPL and KRISS. Korean Chem Soc 22:1341–1344Google Scholar
  20. 20.
    Zuas OM, Mulyana R, Hamim N, Budiman H (2017) Measurement of nitrous oxide in a nitrogen matrix using gas chromatography with micro electron capture detection: validation of analytical method. J Eng Exact Sci JCEC 3:381–394CrossRefGoogle Scholar
  21. 21.
    Dressler, M. (1986) Selective gas chromatographic detectors. J Chromatogr Libr, vol 36. Elsevier Science Publishers, AmsterdamGoogle Scholar
  22. 22.
    Koel BE, Panja C, Kim J, Samano E (2006) Adsorbed layers on surfaces. Part 5: adsorption of molecules on metal, semiconductor and oxide surfaces: 3.8.4 CO2, NO2, SO2, OCS, N2O, O3 on metal surfaces. In: Bonzel HP (ed) Landolt-Börnstein—Group III condensed matter 42A5 (adsorbed layers on surfaces. Part 5: adsorption of molecules on metal, semiconductor and oxide surfaces). https://materials.springer.com/lb/docs/sm_lbs_978-3-540-39357-3_3
  23. 23.
    Lee S, Kim ME, Oh SH, Kim JS (2018) Determination of physical adsorption loss of primary standard gas mixtures in cylinders using cylinder-to-cylinder division. Metrologia 54:L26–L33CrossRefGoogle Scholar
  24. 24.
    Panda N (2016) Development of gaseous formaldehyde standards by dynamic gravimetry. University of Science and Technology, South KoreaGoogle Scholar
  25. 25.
    Schmidt WP, Kovak, KW, Licht, WR, Feldman SL (2000) Managing trace contaminants in cryogenic air separation. In: 12th intersociety cryogenic symposium at 2000 AIChE Spring Meeting Atlanta, GA, Session T8001Google Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.National Metrology Institute of South Africa (NMISA)Lynnwood RidgeSouth Africa
  2. 2.Department of ChemistryUniversity of WitwatersrandJohannesburgSouth Africa

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