由於溫室效應氣體之濃度在大氣中逐年上升，其中二氧化碳、甲烷、氧化亞氮因具有較高濃度、長生命期與在紅外光區有高吸收之緣故；因此，本實驗之目的為建立自動化搭配逆吹系統以期能快速地分析上述三者溫室效應物種，實驗中所使用之管柱為Hayesep Q與Porapak Q。火焰離子偵測器負責二氧化碳與甲烷之量測，電子捕捉偵測器則負責氧化亞氮之量測；二氧化碳則在375 ̊C之條件下，經由使用鎳觸媒之甲烷轉化氣轉化為甲烷才可被火焰離子偵測器所量測。樣品迴圈約為2毫升，進樣壓力則設定為700 torr。二氧化碳、甲烷與氧化亞氮之線性關係分別為1.000、0.9907與0.9990；偵測下限則分別為1.02 ppmv、1.07 ppmv與6.40 ppbv。三種氣體在系統的量測下, 相對標準偏差 (Relative Standard Deviation) 皆在1%以內, 表現出實驗的精確性。

The so called enhanced global warming is caused by the increase in the concentration of greenhouse gases (GHGs) in the atmosphere due to anthropogenic activities. Of all the GHGs, CO2, CH4, and N2O are the major contributors due to their large abundance, long lifetimes, and relatively strong IR absorption abilities. In this experiment, the three GHGs in the atmosphere will be measured using gas chromatography (GC) with the packed column back-flushed method. The stationary phases used for the packed columns are Hayesep Q and Porapak Q. For CO2 and CH4 analysis flame ionization detection (FID) is used, and for N2O analysis electron capture detection (ECD) is used. CO2 was first reduced into CH4 by an in-line Ni catalyst kept at 375 ̊C before detection with FID. To perform sample injection, the pressure for the sample loop (2 mL) was set at 700 torr with a pressure gauge which allowed automatic sample filling. The linearity for CH4, CO2, and N2O, as depicted by the correlation coefficients (R2), are 0.9907, 1.000, and 0.9990, respectively. Limits detection for these three gases are 1.07 ppmv, 1.02 ppmv, 6.40 ppbv, respectively. Precision, as depicted by the standard deviation (RSD), is better than 1% for the three gases.

1. Intergovernmental Panel on Climate Change (IPCC), 2007, Climate Change 2007: Synthesis Report
2. United State - Environmental Protection Agency (US EPA), 2011, Basic Information, http://www.epa.gov/climatechange/basicinfo.html
3. United State - Environmental Protection Agency (US EPA), 2012, Greenhouse Gas Emissions, http://www.epa.gov/climatechange/emissions/index.html
4. UNEP/GRID Arendal, 2011, Radiative Forcing, http://www.grida.no/publications/vg/climate/page/3059.aspx
5. Hewitt, C.N and Jackson, A., 2003, Handbook of Atmospheric Science : Principles and Applications, Blackwell Publishing, USA
6. Tissue, B.M, 2000, Beer-Lambert Law, http://www.files.chem.vt.edu/chem-ed/spec/beerslaw.html
7. Lancashire, R.J, 2011, Chemistry and Crime, http://wwwchem.uwimona.edu.jm:1104/courses/CHEM2402/Crime/Breathalyser.html
8. Laan, S.V. D, R.E.M Neubert, and H.A.J. Meijer, 2009, A Single Gas Chromatograph for Accurate Atmospheric Mixing Ratio Measurement of CO2, CH4, N2O, SF6 and CO, Atmospheric Measurement Techniques, 2: 549-559
9. Zalicki, P., and Zare, R.N, 1995, Cavity Ring-Down Spectroscopy For Quantitative Absorption Measurements, Journal of Chemical Physics, 102 (7) : 2708-2717
10. University of Adeleide, 1995, Flame-Ionization Detector (FID), http://www.chemistry.adelaide.edu.au/external/soc-rel/content/fid.htm
11. Grob, R.L and Barry, E.E, 2004, Modern Practice of Gas Chromatography, John Wiley and Sons,Inc., New Jersey
12. University of Adeleide, 1995, Electron Capture Detector, http://www.chemistry.adelaide.edu.au/external/soc-rel/content/ecd.htm
13. Halmann, M.M and Steinberg, M., 1999, Greenhouse Gas Carbon Dioxide Mitigation Science and Technology, Lewis Publisher, Washington
14. Anonymous, 2012, The Greenhouse Effect, http://www.ucar.edu/learn/1_3_1.htm
15. SEAI, 2012, Greenhouse Effect, http://www.seai.ie/Schools/Post_Primary/Subjects/Geography_LC/Greenhouse_Effect_/
16. UNICEF, 2012, Global Warming, http://www.our-energy.com/global_warming.html
17. Baird, C. and Cann, M., 2005, Environmental Chemistry 3rd Edition, W.H. Freeman and Company, New York
18. Butler, J.H., 2011, The NOAA Annual Greenhouse Gas Index (AGGI), http://www.esrl.noaa.gov/gmd/aggi/
19. Reay, D., C.N. Hewitt, K. Smith, and J. Grace, 2007, Greenhouse Gas Sinks, Athenaeum Press Ltd, Gateshead, UK
20. Mѐszaros, E., 1981, Atmospheric Chemistry Fundamental Aspects, Elsevier Publishing Company, New York
21. ESRL NOAA, 2012, Scripps Carbon Dioxide (CO2) Measurements, http://www.esrl.noaa.gov/gmd/obop/mlo/programs/coop/scripps/co2/co2.html
22. Hogan, K.B, J.S. Hoffman, and A.M. Thompson, 1991, Methane on The Greenhouse Agenda, Nature, 354:181-182
23. Khalil, M.A.K, 2000, Atmospheric Methane : Its Role in the Global Environment, Springer-Verlag Berlin Heidelberg, Germany
24. Lousier, D., 2010, Greenhouse Gases: Nitrous Oxide, BC Institute of Social Ecology, http://www.bcise.com/CurrentIssuePapers/Nitrous-Oxide.pdf
25. United State - Environmental Protection Agency (US EPA), 2010, Nitrous Oxide, http://www.epa.gov/nitrousoxide/sources.html
26. Khalil, M.A.K, R.A. Rasmussen, and M.J Shearer, 2001, Atmospheric Nitrous Oxide : Patterns of Global Change During Recent Decades and Centuries, Chemosphere, 47:807-821
27. Anonymous, 2012, Global Warming Potential, http://www.global-greenhouse-warming.com/global-warming-potential.html
28. Anonymous, 2012, Global Warming Potentials (GWPs), http://eeocw.org/get-involved/global-warming-potential
29. Vranes, K., 2011, Climate Change : Radiative Forcing, http://www.eoEarth.org/article/Radiative_forcing?topic=49491
30. Supelco, 2009, Chromatography Products for Analysis & Purification, Sigma-Aldrich
31. McNair, H.M and Miller, J.M., 1998, Basic Gas Chromatography, John Wiley and Sons, Inc., USA
32. Settle, F., 1997, Instrumental Techniques for Analytical Chemistry, Prentice-Hall, Inc., New Jersey
33. Wang, Y., Y. Wang, H. Ling, 2010, A New Carrier Gas Type for Accurate Measurement of N2O by GC-ECD, Advances in Atmospheric Sciences, 27(6) : 1322-1330
34. Maggs, R.J, P.L. Joynes, A.J. Davies, and J.E. Lovelock, 1971, The Electron Capture Detector-A New Mode of Operation, Analytical Chemistry, 43(14) : 1966-1971
35. Thom, M., R. Bosinger, M. Schmidt, and I. Levin, 1993, The Regional Budget of Atmospheric Methane of A Highly Populated Area, Chemosphere, 26 (1-4) : 143-160
36. Ravishankara, A.R., J.S. Daniel, and R.W. Portmann, 2009, Nitrous Oxide (N2O): The Dominant Ozone-Depleting Substance Emitted in the 21st Century, Science, 326 : 123-125
37. VICI, 2012, Hayesep Chromatograms, http://www.vici.com/hayesep/hsq_c1.php
38. Anonymous, 2012, Methanizer-Equipped FID Detector, http://www.srigc.com/Methnizer.pdf
39. Jacob, D.J, 1999, Introduction of Atmospheric Chemistry, Princeton University Press, New Jersey
40. AVL, Measurement Principle Using FTIR (Fourier Transform Infra-Red) Spectrometer (AVL SESAM FTIR), labs.ti.bfh.ch/uploads/media/FTIR.pdf
41. Scott, R.P.W, The Fourier Transform IR Spectrometer, http://www.analyticalspectroscopy.net/ap3-8.htm
42. Griffith, D.W.T, N.M. Deutscher, C.G.R. Caldow, G. Kettlewell, M. Riggenbach, and S. Hammer, 2012, A Fourier Transform Infrared Trace Gas Analyser for Atmospheric Applications, Atmos. Meas. Tech., 5 : 3717-3769
43. Vermeulen, A.T, A. Hensen, M.E. Popa, W.C.M van den Bulk, and P.A.C. Jongejan, 2011, Greenhouse Gas Observations from Cabauw Tall Tower (1992-2010), Atmos. Meas. Tech., 4 : 617-664
44. Velazquez, J. and Barron, A.R., 2012, Catalyst Characterization Using Thermal Conductivity Detector, http://cnx.org/content/m43579/latest/?collection=col10699/latest
45. Coleman III, W.M., L.M. Dominguez, and B.M. Gordon, 1996, A Gas Chromatographic Continuous Emissions Monitoring System for the Determination of VOCs and HAPs, J. Air & Waste Manage. Assoc., 46 : 30-34
46. Schuck, T.J., C.A.M. Brenninkmeijer, F. Slemr, I. Xueref-Remy, and A. Zahn, 2009, Greenhouse Gas Analysis of Air Samples Collected Onboard the CARIBIC Passenger Aircraft, Atmos. Meas. Tech., 2 : 449-464
47. Thusse, TH. R., 1978, Gas Chromatographic Measurement of Nitrous Oxide and Carbon Dioxide in Air Using Electron Capture Detection, Atmospheric Environment, 12 : 2001-2003
48. Popa, M.E., M. Gloor, A.C. Manning, A. Jordan, U. Schultz, F. Haensel, T. Seifert, and M. Heimann, 2010, Measurement of Greenhouse Gases and Related Tracers at Bialystok Tall Tower Station in Poland, Atmos. Meas. Tech., 3 : 407-427