Ou-Yang, Chang-Feng
Assistant Professor
Name Ou-Yang, Chang-Feng
Email
Phone (03)4227151 ext. 65930
Professional Field:
Analytical Chemistry, Instrumental Analysis
Research Interest Analytical Chemistry, Instrumental analysis
School Name Department Degree Duration
National Central University Department of Chemistry Ph.D. 2004.09 ~ 2010.06
National Central University Department of Chemistry M.S. 2002.09 ~ 2004.06
Providence University Department of Applied Chemistry B.S. 1997.09 ~ 2002.06
Organization Title Department Job Title Duration
National Central University Department of Chemistry Assistant Professor 2025.02 ~ Up to today
National Central University Department of Atmospheric Sciences Project Associate Research Fellow 2023.08 ~ 2025.01
National Central University Department of Atmospheric Sciences Associate Research Fellow 2019.08 ~ 2022.07
National Central University Department of Atmospheric Sciences Project Assistant Research Fellow 2017.06 ~ 2023.07
National Central University Department of Atmospheric Sciences Assistant Researcher 2016.08 ~ 2019.07
National Oceanic and Atmospheric Administration Global Monitoring Laboratory visiting scholar 2015.05 ~ 2015.08
National Central University Department of Atmospheric Sciences Postdoctoral Research 2011.05 ~ 2016.07
Honor Category Year Award Name Awarding Unit
Inside School Honor 2024 Research Award for Paper Contribution National Central University
Inside School Honor 2023 Research Award for Paper Contribution National Central University
  1. Nguyen, D.H., H.C. Hsieh, S.P. Chen, C.F. Ou-Yang, C.C. Chang, W.T. Liu, C.H. Wang*, J.L. Wang* (2025), Analysis of high-ozone episodes using a chemical metric based on the reactivities of organic precursors. JGR-Atmospheres, 130, e2025JD043921. (Q2, IF = 3.4)
  2. Chang, C.Y., Y.C. Chen, J.L. Wang, W.H. Kao, C.H. Wang, X.X. Pan, C.F. Ou-Yang, H.C. Hsieh, W.T. Liu, C.C. Chang* (2025), A study of VOCs in waste incinerator plumes and landfill emissions via drone sounding. Atmos. Environ-X, 27, 100344. (Q2, IF = 3.4)
  3. Ou-Yang, C.F.*, J.L. Wang, C.C. Lin, C.Y. Chiu, W.T. Liu, X. Lan, D. Neff, J.B. Miller, S.E. Michel, B.H. Vaughn, Y.C. Chiu, J.Y. Yu, C.C. Cheng, R.C. Schnell, J.W.C. White, N.H. Lin* (2025), Long-term measurements of CO2, CH4, and isotopic ratios of CO2 in the western Pacific: Trends, variations, and implications. JGR-Atmospheres, 130, e2024JD042255. (Q2, IF = 3.4)
  4. Ou-Yang, C.F.*, Y.J. Chen, H.C. Hsieh, C.T. Lee, K.H. Chi, N.H. Lin, C.C. Chang, J.L. Wang* (2024), Identification of organic constituents on atmospheric particulate matter in the East Asian background air of free troposphere by GC×GC-TOFMS. Chemosphere, 364, 143095. (Q1, IF = 8.1)
  5. Shimada, K.*, Y. Geka, S. Kato, C.K. Chan, Y.P. Kim, C.F. Ou-Yang, N.H. Lin, S. Hatakeyama (2024), Possibility of condensation of nitric acid for cloud condensation nucleus in the summer at Mt. Fuji. Atmos. Pollut. Res., 15, 101940. (Q2, IF = 3.5)
  6. Ou-Yang, C.F., C.C. Chang*, S.H. Wang, C.C.K. Chou, M.T. Chuang, T.H. Lin, W.N. Chen, T.C. Hsiao, M.C. Yen, Y.C. Wang, N.H. Lin, J.L. Wang* (2023), Integrated ground and vertical measurement techniques to characterize overhead atmosphere: Case studies of local versus transboundary pollution. Sci. Total Environ., 887, 163919. (Q1, IF = 8.2)
  7. Babu, S.R.*, C.F. Ou-Yang, S.M. Griffith, S.K. Pani, S.S.K. Kong, N.H. Lin* (2023), Transport pathways of carbon monoxide from Indonesian fire pollution to a subtropical high-altitude mountain site in the western North Pacific. Atmos. Chem. Phys., 23, 4727-4740. (Q1, IF = 5.2)
  8. Chen, Y.C., J.L. Wang, C.Y. Chang, M.T. Chuang, C.C.K. Chou, X.X. Pan, Y.J. Ho, C.F. Ou-Yang, W.T. Liu, C.C. Chang* (2023), Using drone soundings to study the impacts and compositions of plumes from a gigantic coal-fired power plant. Sci. Total Environ., 893, 164709. (Q1, IF = 8.2)
  9. Chen, S.P.*, C.H. Lu, J.E. Davies, C.F. Ou-Yang, N.H. Lin, A. Huff, B.R. Pierce, S. Kondragunta, J.L. Wang* (2023), Infusing satellite data into aerosol forecast for near real-time episode detection and diagnosis in East Asia. Sci. Total Environ., 856, 158797. (Q1, IF = 8.2)
  10. von Schneidemesser, E.*, B.C. McDonald, H.D. van der Gon, M. Crippa, D, Guizzardi, A. Borbon, P. Dominutti, G. Huang, G. Janssens-Maenhout, M. Li, C.F. Ou-Yang, S. Tisinai, J.L. Wang (2023), Comparing urban NMVOCs measurements with representation in emission inventories - A global perspective. JGR-Atmospheres, 128, e2022JD037906. (Q2, IF = 3.8)
  11. Ou-Yang, C.F.*, S.R. Babu, J.R. Lee, M.C. Yen, S.M. Griffith, C.C. Lin, S.C. Chang, N.H. Lin* (2022), Detection of stratospheric intrusion events and their role in ozone enhancement at a mountain background site in sub-tropical East Asia. Atmos. Environ., 268, 118779. (Q1, IF = 5.0)
  12. Kong, S.S.K., S.K. Pani, S.M. Griffith, C.F. Ou-Yang, S.R. Babu, M.T. Chuang, M.C.G. Ooi, W.S. Huang, G.R. Sheu, N.H. Lin* (2022), Distinct transport mechanisms of East Asian dust and the impact on downwind marine and atmospheric environments. Sci. Total Environ., 827, 154255. (Q1, IF = 9.8)
  13. Babu, S.R.*, S.K. Pani, C.F. Ou-Yang, N.H. Lin* (2022), Impact of 21 June 2020 annular solar eclipse on meteorological parameters, O3 and CO at a high mountain site in Taiwan. Aerosol Air Qual. Res., 22, 220248. (Q2, IF = 4.0)
  14. Ou-Yang, C.F., T.L. Lin, C.C. Chang, H.C. Hsieh, C.H. Wang*, J.L. Wang* (2020), Characterization of industrial plumes of volatile organic compounds by guided sampling. Chemosphere, 241, 124957. (Q1, IF = 7.086)
  15. Ou-Yang, C.F., H.C. Hsieh, F.Y. Cheng, N.H. Lin, S.C. Chang, J.L. Wang* (2020), Decadal trends of speciated non-methane hydrocarbons in Taipei. JGR-Atmospheres, 125, e2019JD031578. (Q1, IF = 4.261)
  16. Nguyen, L.S.P., H.Y. Huang, T.L. Lei, T.T. Bui, S.H. Wang*, K.H. Chi, G.R. Sheu*, C.T. Lee, C.F. Ou-Yang, N.H. Lin (2020), Characterizing a landmark biomass-burning event and its implication for aging processes during long-range transport. Atmos. Environ., 241, 117766. (Q1, IF = 4.798)
  17. Adcock, K.E.*, M.J. Ashfold, C. Chou, L.J. Gooch, N.M. Hanif, J.C. Laube, D.E. Oram, C.F. Ou-Yang, M. Panagi, W.T. Sturges, C.E. Reeves (2020), Investigation of East Asian emissions of CFC-11 using atmospheric observations in Taiwan. Environ. Sci. Technol., 54, 3814-3822. (Q1, IF = 9.028)
  18. Droste, E.S.*, K.E. Adcock, M.J. Ashfold, C. Chou, Z. Fleming, P.J. Fraser, L.J. Gooch, A.J. Hind, R.L. Langenfelds, E. Leedham Elvidge, N.M. Hanif, S. O’Doherty, D.E. Oram, C.F. Ou-Yang, M. Panagi, C.E. Reeves, W.T. Sturges, J.C. Laube (2020), Trends and emissions of six perfluorocarbons in the Northern and Southern Hemispheres. Atmos. Chem. Phys., 20, 4787-4807. (Q1, IF = 6.133)
  19. Pani, S.K., C.F. Ou-Yang, S.H. Wang, J.A. Ogren, P.J. Sheridan, G.R. Sheu, N.H. Lin* (2019), Relationship between long-range transported atmospheric black carbon and carbon monoxide at a high-altitude background station in East Asia. Atmos. Environ., 210, 86-99. (Q1, IF = 4.039)
  20. Chang, C.C.*, C.Y. Chang, J.L. Wang, M.R. Lin, C.F. Ou-Yang, H.H. Pan, Y.C. Chen (2018), A study of atmospheric mixing of trace gases by aerial sampling with a multi-rotor drone. Atmos. Environ., 184, 254-261. (Q1, IF = 4.012)
  21. Ou-Yang, C.F., W.C. Liao, C.C. Chang*, H.C. Hsieh, J.L. Wang* (2018), Guided episodic sampling for capturing and characterizing industrial plumes. Atmos. Environ., 174, 188-193. (Q1, IF = 4.012)
  22. Adcock, K.E.*, C.E. Reeves, L.J. Gooch, E.C. Leedham Elvidge, M.J. Ashfold, C.A.M. Brenninkmeijer, C. Chou, P.J. Fraser, R.L. Langenfelds, N.M. Hanif, S. O'Doherty, D.E. Oram, C.F. Ou-Yang, S.M. Phang, A.A. Samah, T. Röckmann, W.T. Sturges, J.C. Laube (2018), Continued increase of CFC-113a (CCl3CF3) mixing ratios in the global atmosphere: Emissions, occurrence and potential sources. Atmos. Chem. Phys., 18, 4737-4751. (Q1, IF = 5.668)
  23. Ou-Yang, C.F., C.C. Chang*, J.L. Wang, K. Shimada, S. Hatakeyama, S. Kato, J.Y. Chiu, G.R. Sheu, N.H. Lin* (2017), Characteristics of summertime volatile organic compounds in the lower free troposphere: Background measurements at Mt. Fuji. Aerosol Air Qual. Res., 17, 3037-3051. (Q2, IF = 2.589)
  24. Hung, N.T., C.T. Li, S.H. Wang, C.F. Ou-Yang, C.Y. Lin, C.T. Lee, N.H. Lin, K.H. Chi* (2017), Long-term monitoring of atmospheric PCDD/Fs at Mount Lulin during spring season: PCDD/F source apportionment through a simultaneous measurement in Southeast Asia. Chemosphere, 185, 368-375. (Q1, IF = 4.427)
  25. Oram, D.E.*, M.J. Ashfold, J.C. Laube, L.J. Gooch, S. Humphrey, W.T. Sturges, E. Leedham-Elvidge, G.L. Forster, N.R.P. Harris, M.I. Mead, A.A. Samah, S.M. Phang, C.F. Ou-Yang, N.H. Lin, J.L. Wang, A.K. Baker, C.A.M. Brenninkmeijer, D. Sherry (2017), A growing threat to the ozone layer from short-lived anthropogenic chlorocarbons. Atmos. Chem. Phys., 17, 11929-11741. (Q1, IF = 5.509)
  26. Guha, T., C.T. Lin, S.K. Bhattacharya, A.S. Mahajan, C.F. Ou-Yang, Y.P. Lan, S.C. Hsu, M.C. Liang* (2017), Isotopic ratios of nitrate in aerosol samples from Mt. Lulin, a high-altitude station in Central Taiwan. Atmos. Environ., 154, 53-69. (Q1, IF = 3.708)
  27. Ou-Yang, C.F., H.C. Hua, Y.C. Chou, M.K. Teng, W.T. Liu, J.L. Wang* (2017), Two-dimensional gas chromatography with electron capture detection for the analysis of atmospheric ozone depleting halocarbons. J. Chromatogr. A, 1499, 158-164. (Q1, IF = 3.716)
  28. Hsieh, H.C., C.F. Ou-Yang, J.L. Wang* (2017), Revelation of coupling biogenic with anthropogenic isoprene by highly time-resolved observation. Aerosol Air Qual. Res., 17, 721-729. (Q2, IF = 2.589)
  29. Ou-Yang, C.F., Y.X. Huang, T.J. Huang, Y.S. Chen, C.H. Wang, J.L. Wang* (2016), Characterization of thermal desorption with the Deans-switch technique in gas chromatographic analysis of volatile organic compounds. J. Chromatogr. A, 1462, 107-114. (Q1, IF = 3.981)
  30. Ou-Yang, C.F., W.C. Liao, P.C. Wang, G.J. Fan, C.C. Hsiao, M.T. Chuang, C.C. Chang, N.H. Lin, J.L. Wang* (2016), Construction of a cryogen-free thermal desorption gas chromatographic system with off-the-shelf components for monitoring ambient volatile organic compounds. J. Sep. Sci., 39, 1489-1499. (Q2, IF = 2.557)
  31. Laube, J.C.*, N. Mohd Hanif, P. Martinerie, E. Gallacher, P.J. Fraser, R. Langenfelds, C.A.M. Brenninkmeijer, J. Schwander, E. Witrant, J.L. Wang, C.F. Ou-Yang, L.J. Gooch, C.E. Reeves, W.T. Sturges, D.E. Oram (2016), Tropospheric observations of CFC-114 and CFC-114a with a focus on long-term trends and emissions. Atmos. Chem. Phys., 16, 15347-15358. (Q1, IF = 5.318)
  32. Sayer, A.M.*, N.C. Hsu, T.C. Hsiao, P. Pantina, F. Kuo, C.F. Ou-Yang, B.N. Holben, S. Janjai, S. Chantara, S.H. Wang, A.M. Loftus, N.H. Lin, S.C. Tsay (2016), In-situ and remotely-sensed observations of biomass burning aerosols at Doi Ang Khang, Thailand during 7-SEAS/BASELInE 2015. Aerosol Air Qual. Res., 16, 2786-2801. (Q2, IF = 2.606)
  33. Pantina, P.*, S.C. Tsay, T.C. Hsiao, A.M. Loftus, F. Kuo, C.F. Ou-Yang, A.M. Sayer, S.H. Wang, N.H. Lin, N.C. Hsu, S. Janjai, S. Chantara, A.X. Nguyen (2016), COMMIT in 7-SEAS/BASELInE: Operation of and observations from a novel, mobile laboratory for measuring in-situ properties of aerosols and gases. Aerosol Air Qual. Res., 16, 2728-2741. (Q2, IF = 2.606)
  34. Chi, K.H.*, N.T. Hung, C.Y. Lin, S.H. Wang, C.F. Ou-Yang, C.T. Lee, N.H. Lin (2016), Evaluation of atmospheric PCDD/Fs at two high-altitude stations in Vietnam and Taiwan during Southeast Asia biomass burning. Aerosol Air Qual. Res., 16, 2706-2715. (Q2, IF = 2.606)
  35. Nguyen, D.L., K. Kawamura, K. Ono, S.S. Ram, G. Engling, C.T. Lee*, N.H. Lin, S.C. Chang, M.T. Chuang, T.C. Hsiao, G.R. Sheu, C.F. Ou Yang, K.H. Chi, S.A. Sun (2016), Comprehensive PM2.5 organic molecular composition and stable carbon isotope ratios of biomass burning smoke at Sonla, Vietnam: Fingerprint of biomass burning components. Aerosol Air Qual. Res., 16, 2618-2634. (Q2, IF = 2.606)
  36. Lee, C.T.*, S.S. Ram, D.L. Nguyen, C.C.K. Chou, S.Y. Chang, N.H. Lin, S.C. Chang, T.C. Hsiao, G.R. Sheu, C.F. Ou-Yang, K.H. Chi, S.H. Wang, X.C. Wu (2016), Aerosol chemical profile of near-source biomass burning smoke in Sonla, Vietnam during 7-SEAS campaigns in 2012 and 2013. Aerosol Air Qual. Res., 16, 2603-2617. (Q2, IF = 2.606)
  37. Ou-Yang, C.F., M.C. Yen, T.H. Lin, J.L. Wang, R.C. Schnell, P.M. Lang, S. Chantara, N.H. Lin* (2015), Impact of equatorial and continental airflow on primary greenhouse gases in the northern South China Sea. Environ. Res. Lett., 10, 065005. (Q1, IF = 4.134)
  38. Ou-Yang, C.F., C.C. Chang*, S.P. Chen, C. Chew, B.R. Lee, C.Y. Chang, S.A. Montzka, G.S. Dutton, J.H. Butler, J.W. Elkins, J.L. Wang* (2015), Changes in the levels and variability of halocarbons and the compliance with the Montreal Protocol from an urban view. Chemosphere, 138, 438-446. (Q1, IF = 4.208)
  39. Vollmer, M.K.*, M. Rigby, J.C. Laube, S. Henne, T.S. Rhee, L.J. Gooch, A. Wenger, D. Young, L.P. Steele, R.L. Langenfelds, C.A.M. Brenninkmeijer, J.L. Wang, C.F. Ou-Yang, S.A. Wyss, M. Hill, D.E. Oram, P.B. Krummel, F. Schoenenberger, C. Zellweger, P.J. Fraser, W.T. Sturges, S. O’Doherty, S. Reimann (2015), Abrupt reversal in emissions and atmospheric abundance of HCFC-133a (CF3CH2Cl). Geophys. Res. Lett., 42, 8702-8710. (Q1, IF = 4.212)
  40. Ou-Yang, C.F., N.H. Lin*, C.C. Lin, S.H. Wang, G.R. Sheu, C.T. Lee, R.C. Schnell, P.M. Lang, T. Kawasato, J.L. Wang* (2014), Characteristics of atmospheric carbon monoxide at a high-mountain background station in East Asia. Atmos. Environ., 89, 613-622. (Q1, IF = 3.281)
  41. Liu, W.T., S.P. Chen, C.C. Chang*, C.F. Ou-Yang, W.C. Liao, Y.C. Su, Y.C. Wu, C.H. Wang, J.L. Wang* (2014), Assessment of carbon monoxide (CO) adjusted non-methane hydrocarbon (NMHC) emissions of a motor fleet - A long tunnel study. Atmos. Environ., 89, 403-414. (Q1, IF = 3.281)
  42. Chen, S.P., W.T. Liu, C.F. Ou-Yang, J.S. Chang*, J.L. Wang* (2014), Optimizing the emission inventory of volatile organic compounds (VOCs) based on network observations. Atmos. Environ., 84, 1-8. (Q1, IF = 3.281)
  43. Ou-Yang, C.F., H.C. Hsieh, S.H. Wang, N.H. Lin, C.T. Lee, G.R. Sheu, J.L. Wang* (2013), Influence of Asian continental outflow on the regional background ozone level in northern South China Sea. Atmos. Environ., 78, 144-153. (Q1, IF = 3.062)
  44. Ou-Yang, C.F., J.Y. Liu, H.M. Kao, J.H. Wang, S.P. Liu, J.L. Wang* (2013), Analysis of polycyclic aromatic hydrocarbons using porous material MCM-41 as a sorbent. Anal. Methods, 5, 6874-6880. (Q2, IF = 1.938)
  45. Lin, N.H.*, S.C. Tsay, J.S. Reid, M.C. Yen, G.R. Sheu, S.H. Wang, K.H. Chi, M.T. Chuang, C.F. Ou-Yang, J.S. Fu, C.T. Lee, L.C. Wang, J.L. Wang, C.N. Hsu, B.N. Holben, Y.C. Chu, H. Maring, N.X. Anh, K. Sopajaree, S.J. Chen, M.T. Cheng, B.J. Tsuang, C.J. Tsair, C.M. Peng, C.T. Chang, K.S. Lin, Y.I. Tsai, W.J. Lee, S.C. Chang, J.J. Liu, W.L. Chiang (2013), An overview of regional experiments on biomass burning aerosols and related pollutants in Southeast Asia: From BASE-ASIA and Dongsha Experiment to 7-SEAS. Atmos. Environ., 78, 1-19. (Q1, IF = 3.062)
  46. Cheng, F.Y.*, Z.M. Yang, C.F. Ou-Yang, F. Ngan (2013), A numerical study of the dependence of long-range transport of CO to a mountain station in Taiwan on synoptic weather patterns during the Southeast Asia biomass-burning season. Atmos. Environ., 78, 277-290. (Q1, IF = 3.062)
  47. Sheu, G.R.*, N.H. Lin, C.T. Lee, J.L. Wang, M.T. Chuang, S.H. Wang, K.H. Chi, C.F. Ou-Yang (2013), Distribution of atmospheric mercury in northern Southeast Asia and South China Sea during Dongsha Experiment. Atmos. Environ., 78, 174-183. (Q1, IF = 3.062)
  48. Chi, K.H.*, C.Y. Lin, C.F. Ou Yang, S.C. Hsu, Y.F. Chen, S. Luo, S.J. Kao (2013), Evaluation of environmental fate and sinks of PCDD/Fs during specific extreme weather events in Taiwan. J. Asian Earth Sci., 77, 268-280. (Q1, IF = 3.062)
  49. Liao, W.C., C.F. Ou-Yang, C.H. Wang, C.C. Chang, J.L. Wang* (2013), Two-dimensional gas chromatographic analysis of ambient light hydrocarbons. J. Chromatogr. A, 1294, 122-129. (Q1, IF = 4.258)
  50. Ou Yang, C.F., N.H. Lin, G.R. Sheu, C.T. Tee, J.L. Wang* (2012), Seasonal and diurnal variations of ozone at a high-altitude mountain baseline station in East Asia. Atmos. Environ., 46, 279-288. (Q1, IF = 3.110)
  51. Wang, S.H., N.H. Lin*, C.F. OuYang, J.L. Wang, J.R. Campbell, C.M. Peng, C.T. Lee, G.R. Sheu, S.C. Tsay, (2010), Impact of Asian dust and continental pollutants on cloud chemistry observed in northern Taiwan during the experimental period of ABC/EAREX 2005. JGR-Atmospheres, 115, doi:10.1029/2009jd013692. (Q1, IF = 3.303)
  52. Sheu, G.R., N.H. Lin*, J.L. Wang, C.T. Lee, C.F. Ou Yang, S.H. Wang, (2010), Temporal distribution and potential sources of atmospheric mercury measured at a high-elevation background station in Taiwan. Atmos. Environ., 44, 2393-2400. (Q1, IF = 3.226)
  53. Chen, S.P., T.H. Liu, T.F. Chen, C.F. Ou Yang, J.L. Wang, J.S. Chang* (2010), Diagnostic modeling of PAMS VOC observation. Environ. Sci. Technol., 44, 4635-4644. (Q1, IF = 4.827)
  54. Chi, K.H.*, C.Y. Lin, C.F. OuYang, J.L. Wang, N.H. Lin, G.R. Sheu, C.T. Lee (2010), PCDD/F Measurement at a high-altitude station in central Taiwan: Evaluation of long-range transport of PCDD/Fs during the southeast Asia biomass burning event. Environ. Sci. Technol., 44, 2954-2960. (Q1, IF = 4.827)
  55. Chang, C.C., C.F. OuYang, C.H. Wang, S.W. Chiang, J.L. Wang* (2010), Validation of in-situ measurements of volatile organic compounds through flask sampling and gas chromatography/mass spectrometry analysis. Atmos. Environ., 44, 1301-1307. (Q1, IF = 3.226)
  56. Ou Yang, C.F., Y.C. Lin, N.H. Lin, C.T. Lee, G.R. Sheu, S.H. Kam, J.L. Wang* (2009), Inter-comparison of three instruments for measuring regional background carbon monoxide. Atmos. Environ., 43, 6449-6453. (Q1, IF = 3.139)
  57. Ou Yang, C.F., S.H. Kam, J.R. Tzou, J.L. Wang* (2009), Assessment of removal efficiency of perfluorocompounds in a semiconductor fabrication plant by gas chromatography. Chemosphere, 76, 1273-1277. (Q1, IF = 3.253)
  58. Tanimoto, H.*, H. Mukai, Y. Sawa, H. Matsueda, S. Yonemura, T. Wang, S. Poon, A. Wong, G. Lee, J.Y. Jung, K.R. Kim, M.H. Lee, N.H. Lin, J.L. Wang, C.F. Ou-Yang, C.F. Wu, H. Akimoto, P. Pochanart, K. Tsuboi, H. Doi, C. Zellweger, J. Klausen (2007), Direct assessment of international consistency of standards for ground-level ozone: strategy and implementation toward metrological traceability network in Asia. J. Environ. Monit., 9, 1183-1193. (Q2, IF = 1.992)