DRI / DIRECTORY / STEVEN SAI HANG HO
Steven Sai Hang Ho Profile Photo
Dr. Steven Sai Hang Ho
Affiliate Faculty
E-Mail 
Steven.Ho@dri.edu
Division 
Atmospheric Sciences

Research Areas

  • Environmental Sciences
  • Indoor and outdoor pollution
  • analytical chemistry
  • Method develoopment and standardization
  • Atmospheric chemistry

Professional Interests

Dr. Ho has over twelve years of research experience in environmental sciences and analytical chemistry. He is an expert in indoor and outdoor environmental pollution. He has established a new approach by combining on-sorbent derivatization and in-injection thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) to measure airborne carbonyls in polluted sources and ambient air. In recent years, he has explored the in-injection TD-GC/MS method to analyze semi-volatile organic compounds (SVOCs) in particulate matter.

His current research includes: (i) analysis of organic tracers in aerosols for evaluation of anthropogenic and biogenic inputs; (ii) application of receptor modeling for source reconciliation; (iii) further advancement of TD-GC/MS technique; (iv) evaluation of gaseous and particulate carbonyls in indoor and outdoor environments; (v) development and standardization of methods for analysis of water soluble organic carbons (WSOC) in particulate matters; and (vi) determination and correction of carbonate carbon (CC) in analysis of carbonaceous materials in aerosol loaded filter samples with thermal/optical method.

Besides environmental areas, Dr. Ho has extensive knowledge and experience in applications of analytical methods for Traditional Chinese Medicines (TCM) and forensic samples. He also has various laboratory techniques and skills, including: (1) applications and maintenance of GC/MS, high pressure liquid chromatograph (HPLC) with MS, fluorescence, ultra-violet and evaporative light scattering detectors, ion chromatography (IC), thin layer chromatography (TLC), Fourier Transform-Infrared (FT-IR), and thermal/optical transmittance/reflectance carbon analyzer; (2) comparison of different sample extraction approaches; and (3) standardization of new analytical methods and instrumental development.

Currently, Dr. Ho has a commercial and research company in Hong Kong and Xiamen, China to conduct chemical analysis for different samples and local and international environmental research. He is collaborating with different institutes and associations such as the Institute of Earth Environment, Chinese Academy of Sciences (IEECAS, Xian, China), Desert Research Institute (DRI, Reno, NV, USA), The Hong Kong Polytechnic University (HKPU) and The Hong Kong University of Science and Technology (HKUST).

Education

Degree Institution Area
Ph.D. Hong Kong University of Science and Technology, Hong Kong Chemistry
B.Sc. Hong Kong Baptist University, Hong Kong Applied Chemistry

Keywords

Regional VOCs Measurement; Source Apportionment; PM organic tracers, Analytical methods, Environmental chemistry, Aerosol sciences

 

Publications
2024
Haiwei, L., Men, Q., Ho, S.S.H., Cui, L., Lu, Y., Wang, Z., Li, J., Zhang, Y., Wang, J., Chen, L.-W.A., Liao, H., Chow, J. C., Watson, J. G., Cao, J., S.C., L., Ge, X., Huang, Y. (2023). Exploring manganese-catalyzed heterogeneous oxidation of isoprene: An extended insight into atmospheric free-radical chemistry, Science Advances, submitted

2023
Wang, X., Gronstal, S. B., Lopez, B., Jung, H., Chen, L.-W.A., Wu, G., Ho, S.S.H., Chow, J. C., Watson, J. G., Yao, Q., Yoon, S. (2023). Evidence of non-tailpipe emission contributions to PM 2.5 and PM 10 near southern California highways, Environmental Pollution, 120691, 10.1016/j.envpol.2022.120691

Chen, L.-W.A., Wang, X., Lopez, B., Wu, G. Y., Ho, S.S.H., Chow, J. C., Watson, J. G., Yao, Q., Yoon, S. J. (2023). Contributions of non-tailpipe emissions to near-road PM2.5 and PM10: A chemical mass balance study, Environmental Pollution, 122283, 10.1016/j.envpol.2023.122283

2022
Wang, X., Chen, L.-W.A., Lu, M., Ho, K., Lee, S., Ho, S.S.H., Chow, J. C., Watson, J. G. (2022). Apportionment of Vehicle Fleet Emissions by Linear Regression, Positive Matrix Factorization, and Emission Modeling, Atmosphere, 13 (7), 1066
https://www.mdpi.com/2073-4433/13/7/1066

2021
Zhang, Y., Sun, J., Zou, H., Zhang, B., Yang, D., Wang, Q., Li, J., Qu, L., Ho, S.S.H., Cao, J., Shen, Z. (2021). Photochemical aging process on PM2.5 bound PAHs emission from solid fuel combustion in traditional and improved stoves, Atmospheric Research, 263, Article No. 105807.

Li, B., Ho, S.S.H., Li, X., Guo, L., Chen, A., Hu, L., Yang, Y., Chen, D., Lin, A., Fang, X. (2021). A comprehensive review on anthropogenic volatile organic compounds (VOCs) emission estimates in China: Comparison and outlook, Environment International, 156, Article No. 106710.

Xu, H., Feng, R., Wang, Z., Zhang, N., Zhang, R., He, K., Wang, Q., Zhang, Q., Sun, J., Zhang, B., Shen, Z., Ho, S.S.H., Cao, J. (2021). Environmental and health risks of VOCs in the longest inner-city tunnel in Xi’an, Northwest China: Implication of impact from new energy vehicles, Environmental Pollution, 282, Article No. 117057.

Zhang, T., Shen, Z., Zeng, Y., Cheng, C., Wang, D., Zhang, Q., Lei, Y., Zhang, Y., Sun, J., Xu, H., Ho, S.S.H., Cao, J. (2021). Spatial distribution and sources of winter black carbon and brown carbon in six Chinese megacities, Science of the Total Environment, 776, Article No. 143075.

Wang, L., Shen, Z., He, K., Zhang, T., Zhang, Q., Xu, H., Ho, S.S.H., Wang, X. (2021). A long-term chemical characteristics and source apportionment of atmospheric rainfall in a northwest megacity of Xi’an, China, Environmental Science and Pollution Research, 28 (24), 31207-31217.

Xu, H., Li, Y., Feng, R., He, K., Ho, S.S.H., Wang, Z., Ho, K. F., Sun, J., Chen, J., Wang, Y., Liu, Y., Wang, F., Xue, W., Qu, L., Shen, Z., Cao, J. (2021). Comprehensive characterization and health assessment of occupational exposures to volatile organic compounds (VOCs) in Xi’an, a major city of northwestern China, Atmospheric Environment, 246, Article No. 118085.

Wang, B., Lau, Y. S., Huang, Y., Organ, B., Chang, H. C., Ho, S.S.H., Qu, L., Lee, S. C., Ho, K. F. (2021). Chemical and toxicological characterization of particulate emissions from diesel vehicles, Journal of Hazardous Materials, 405, Article No. 124613.

Sun, J., Shen, Z., Wang, R., Li, G., Zhang, Y., Zhang, B., He, K., Tong, Z., Xu, H., Qu, L., Ho, S.S.H., Liu, S., Cao, J. (2021). A comprehensive study on ozone pollution in a megacity in North China Plain during summertime: Observations, source attributions and ozone sensitivity, Environment International, 146, Article No. 106279.

Zhang, Y., Shen, Z., Sun, J., Zhang, L., Zhang, B., Zou, H., Zhang, T., Ho, S.S.H., Chang, X., Xu, H., Wang, T., Cao, J. (2021). Parent, alkylated, oxygenated and nitrated polycyclic aromatic hydrocarbons in PM2.5 emitted from residential biomass burning and coal combustion: A novel database of 14 heating scenarios, Environmental Pollution, 268A, Article No. 115881.

Li, B., Ho, S.S.H., Qu, L., Gong, S., Ho, K. F., Zhao, D., Qi, Y., Chan, C. S. (2021). Temporal and spatial discrepancies of VOCs in an industrial-dominant city in China during summertime, Chemosphere, 264, Article No. 128536.

Niu, X., Wang, Y., Ho, S.S.H., Chuang, H., Sun, J., Qu, L., Wang, G., Ho, K. F. (2021). Characterization of organic aerosols in PM1 and their cytotoxicity in an urban roadside area in Hong Kong, Chemosphere, 263, Article No. 128239.

2020
Cao, J., Wang, Q. Y., Li, L., Zhang, Y., Tian, J., Chen, L.-W.A., Ho, S.S.H., Wang, X., Chow, J. C., Watson, J. G. (2020). Evaluation of the oxidation flow reactor for particulate matter emission limit certification, Atmospheric Environment, 224 (117086), 1-10, 10.1016/j.atmosenv.2019.117086

Sun, J., Shen, Z., Niu, X., Zhang, Y., Zhang, B., Zhang, T., He, K., Xu, H., Liu, S., Ho, S.S.H., Li, X., Cao, J. (2020). Cytotoxicity and potential pathway to vascular smooth muscle cells induced by PM2.5 emitted from raw coal chunks and clean coal combustion, Environmental Science and Technology, 54, 14482-14493.

Xu, H., Ta, W., Yang, L., Feng, R., He, K., Shen, Z., Meng, Z., Zhang, N., Li, Y., Zhang, Y., Lu, J., Li, X., Qu, L., Ho, S.S.H., Cao, J. (2020). Characterizations of PM2.5-bound organic compounds and associated potential cancer risks on cooking emissions from dominated types of commercial restaurants in northwestern China, Chemosphere, 261, Article No. 127758.

Ghadikolaei, M. A., Yung, K., Cheung, C. S., Ho, S.S.H. (2020). Emissions of non-polar organics and impacts on volatility and oxidation reactivity from diesel engine fueled with ternary fuels in blended and fumigation modes, Chemosphere, Article No. 216086.

Chen, X. C., Chuang, H. C., Ward, T. J., Tian, L., Cao, J., Ho, S.S.H., Lau, N. C., Yim, S. H., Ho, K. F. (2020). Indoor, outdoor, and personal exposure to PM2.5 and their bioreactivity among healthy residents of Hong Kong, Environmental Research, 188, Article No. 109780.

Xue, Y., Huang, Y., Ho, S.S.H., Chen, L., Wang, L., Lee, S., Cao, J. (2020). Origin and transformation of ambient volatile organic compounds during a dust-to-haze episode in northwest China, Atmospheric Chemistry and Physics, 20, 5425-5436, 10.5194/acp-20-5425-2020

Niu, X., Li, J., Wang, Q., Ho, S.S.H., Sun, J., Li, L., Cao, J., Ho, K. F. (2020). Characteristics of fresh and aged volatile organic compounds from open burning of crop residues, Science of the Total Environment, 726, Article No. 138545.

Niu, X., Chuang, H., Wang, X., Ho, S.S.H., Li, L., Qu, L., Chow, J. C., Watson, J. G., Sun, J., Lee, S., Cao, J., Ho, K. F. (2020). Cytotoxicity of PM2.5 vehicular emissions in the Shing Mun Tunnel, Hong Kong, Environmental Pollution, 263, Article No. 114386.

2019
Li, B. W., Ho, S.S.H., Gong, S. L., Ni, J. W., Li, H. R., Han, L. Y., Yang, Y., Qi, Y. J., Zhao, D. X. (2019). Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods, Atmos. Chem. Phys., 19 (1), 617-638, 10.5194/acp-19-617-2019

X. Wang, Khlystov, A. Y., Ho, K., Campbell, D. E., Chow, J. C., Kohl, S. D., Watson, J. G., Lee, Shuncheng, Chen, L.-W.A., Lu, M., Ho, S.S.H. (2019). Real-world vehicle emission characterization for the Shing Mun tunnel in Hong Kong and Ft. McHenry tunnel in the U.S.. Health Effects Insitute: Boston, MA
https://www.healtheffects.org/publication/real-world-vehicle-emissions-characterization-shing-mun-tunnel-hong-kong-and-fort

Chow, J. C., Cao, J., Chen, L., Wang, X., Wang, Q., Tian, J., Ho, S.S.H., Watts, A. C., Carlson, T., Kohl, S. D., Watson, J. G. (2019). Changes in PM 2.5 peat combustion source profiles with atmospheric aging in an oxidation flow reactor, Atmospheric Measurement Techniques, 12, 5475-5501, 10.5194/amt-2019-198
https://www.atmos-meas-tech.net/12/5475/2019/amt-12-5475-2019.pdf

Watson, J. G., Cao, J., Chen, L.-W.A., Wang, Q. Y., Tian, J., Wang, X., Gronstal, S. B., Ho, S.S.H., Watts, A. C., Chow, J. C. (2019). Gaseous, PM2.5 mass, and speciated emission factors from laboratory chamber peat combustion, Atmos. Chem. Phys., 19, 14173-14193, 10.5194/acp-19-14173-2019

2018
Ho, S.S.H., Wang, L., Chow, J. C., Watson, J. G., Xue, Y., Huang, Y., Qu, L., Li, B., Dai, W., Li, L., Cao, J. (2018). Optimization and evaluation of multi-bed adsorbent tube method in collection of volatile organic compounds, Atmospheric Research, 202 (Supplement C), 187-195
https://www.sciencedirect.com/science/article/pii/S0169809517308219

Cui, L., X. Wang, Ho, K. F., Gao, Y., Liu, C., Ho, S.S.H., Li, H. W., Lee, S. C., Wang, X. M., Jiang, B., Huang, Y., Chow, J. C., Watson, J. G., Chen, L.-W.A. (2018). Decrease of VOC Emissions from Vehicular Emissions in Hong Kong from 2003 to 2015: Results from a Tunnel Study, Atmospheric Environment, 177, 64-74, 10.1016/j.atmosenv.2018.01.020

X. Wang, Ho, K., Chow, J. C., Kohl, S. D., Chan, C., Cui, L., Lee, Shuncheng, Chen, L.-W.A., Ho, S.S.H., Cheng, Y., Watson, J. G. (2018). Hong Kong vehicle emission changes from 2003 to 2015 in the Shing Mun Tunnel, Aerosol Science and Technology, 52, 1085-1098, 10.1080/02786826.2018.1456650

Li, L., Ho, S.S.H., Chow, J. C., Watson, J. G., Qu, L., Wang, L., Cao, J. (2018). Quantification of oxygenated polycyclic aromatic hydrocarbons in ambient aerosol samples using in-injection port thermal desorption-gas chromatography/mass spectrometry: Method exploration and validation, International Journal of Mass Spectrometry, 433, 25-30, 10.1016/j.ijms.2018.08.005

Li, L., Ho, S.S.H., Han, Y., Chow, J. C., Watson, J. G., Wang, L., Qu, L., Cao, J. (2018). Quantification of nitrated-polycyclic aromatic hydrocarbons in atmospheric aerosol samples with in-injection port thermal desorption-gas chromatography/negative chemical ionization mass spectrometry method, Atmospheric Environment, 192, 84-93, 10.1016/j.atmosenv.2018.08.049

X. Wang, Khlystov, A. Y., Ho, K. F., Campbell, D. E., Chow, J. C., Kohl, S. D., Watson, J. G., Lee, Shuncheng, Chen, L.-W.A., Lu, M., Ho, S.S.H. (2018). Real-world Vehicle Emission Characterization for the Shing Mun Tunnel in Hong Kong and Ft. McHenry Tunnel in the U.S.. Health Effects Institute: Boston, MA, Draft final report.

2017
Ho, S.S.H., Chow, J. C., Yu, J., Watson, J. G., Cao, J., Huang, Y. (2017). Application of thermal desorption mass spectrometry for the analysis of environmental pollutantsChapter : . In Nollett, L. M., Lambropoulou, D. A. (Eds.), Chromatographic Analysis of the Environment, Chromatographic Science Series, 79-108. Taylor & Francis Group, CRC Press: Boca Raton, FL

Ho, S.S.H., Chow, J. C., Watson, J. G., Wang, L., Qu, L., Dai, W., Huang, Y., Cao, J. (2017). Influences of relative humidities and temperatures on the collection of C2-C5 aliphatic hydrocarbons with multi-bed (Tenax TA, Carbograph 1TD, Carboxen 1003) sorbent tube method, Atmospheric Environment, 151, 45-51, 10.1016/j.atmosenv.2016.12.007

Li, L., Ho, S.S.H., Chow, J. C., Watson, J. G., Lee, Shuncheng, Cui, L., Gao, Y., Dai, W., Ho, K., Cao, J. (2017). Characterization and health risk assessment of PM2.5 bound organics inside and outside of Chinese smoking lounges, Chemosphere, 186, 438-445

Wang, J. Z., Guinot, B., Dong, Z. B., Li, X. P., Xu, H. M., Xiao, S., Ho, S.S.H., Liu, S. X., Cao, J. (2017). PM2.5-Bound Polycyclic Aromatic Hydrocarbons (PAHs), Oxygenated-PAHs and Phthalate Esters (PAEs) inside and outside Middle School Classrooms in Xi’an, China: Concentration, Characteristics and Health Risk Assessment, Aerosol Air Qual. Res., 17 (7), 1811-1824, 10.4209/aaqr.2017.03.0109

X. Wang, Khlystov, A. Y., Ho, K., Campbell, D. E., Chow, J. C., Kohl, S. D., Watson, J. G., Lee, Shuncheng, Chen, L.-W.A., Lu, M., Ho, S.S.H. (2017). Real-world Vehicle Emission Characterization for the Shing Mun Tunnel in Hong Kong and Ft. McHenry Tunnel in the U.S.. Health Effects Institute: Desert Research Institute

2016
Han, Y., Wei, C., Huang, R., Bandowe, B., Ho, S.S.H., Cao, J., Jin, Z., Xu, B., Gao, S., Tie, X., An, Z., Wilcke, W. (2016). Reconstruction of atmospheric soot history in inland regions from lake sediments over the past 150 years, Scientific Reports, 6, 10.1038/srep19151
://WOS:000368149800001

Ho, K., Ho, S.S.H., Huang, R., Chuang, H., Cao, J., Han, Y., Lui, K., Ning, Z., Chuang, K., Cheng, T., Lee, S., Hu, D., Wang, B., Zhang, R. (2016). Chemical composition and bioreactivity of PM2.5 during 2013 haze events in China, Atmospheric Environment, 126, 162-170, 10.1016/j.atmosenv.2015.11.055
://WOS:000368958200018

Wang, J., Ho, S.S.H., Ma, S., Cao, J., Dai, W., Liu, S., Shen, Z., Huang, R., Wang, G., Han, Y. (2016). Characterization of PM2.5 in Guangzhou, China: uses of organic markers for supporting source apportionment, Science of the Total Environment, 550, 961-971, 10.1016/j.scitotenv.2016.01.138
://WOS:000371226700095

2015
Wang, J., Ho, S.S.H., Cao, J., Huang, R., Zhou, J., Zhao, Y., Xu, H., Liu, S., Wang, G., Shen, Z., Han, Y. (2015). Characteristics and major sources of carbonaceous aerosols in PM2.5 from Sanya, China, Science of the Total Environment, 530, 110-119, 10.1016/j.scitotenv.2015.05.005
://WOS:000356605800013

Ho, K., Ho, S.S.H., Huang, R., Dai, W., Cao, J., Tian, L., Deng, W. (2015). Spatiotemporal distribution of carbonyl compounds in China, Environmental Pollution, 197, 316-324, 10.1016/j.envpol.2014.11.014
://WOS:000350921500038

Ho, K., Ho, S.S.H., Huang, R., Liu, S., Cao, J., Zhang, T., Chuang, H., Chan, C., Hu, D., Tian, L. (2015). Characteristics of water-soluble organic nitrogen in fine particulate matter in the continental area of China, Atmospheric Environment, 106, 252-261, 10.1016/j.atmosenv.2015.02.010
://WOS:000351966200025

Huang, Y., Ling, Z., Lee, S., Ho, S.S.H., Cao, J., Blake, D., Cheng, Y., Lai, S., Ho, K., Gao, Y., Cui, L., Louie, P. (2015). Characterization of volatile organic compounds at a roadside environment in Hong Kong: An investigation of influences after air pollution control strategies, Atmospheric Environment, 122, 809-818, 10.1016/j.atmosenv.2015.09.036
://WOS:000367413600085

2014
Tang, D., Li, T., Chow, J. C., Kulkarni, S., Watson, J. G., Ho, S.S.H., Quan, Z., Qu, L., Perera, F. (2014). Air pollution effects on fetal and child development: A cohort comparison in China, Environmental Pollution, 185, 90-96
Tang,D.L.; Li,T.Y.; Chow,J.C.; Kulkarni,S.U.; Watson,J.G.; Ho,S.S.H.; Quan,Z.Y.; Qu,L.R.; Perera,F.

Ho, S.S.H., Chow, J. C., Watson, J. G., Ip, S., Ho, K., Dai, W. (2014). Biases in ketone measurements using DNPH-coated solid sorbent cartridges, Analytical Methods, 6, 967-974, 10.1039/C3AY41636D

Zhang, T., Cao, J., Chow, J. C., Shen, Z., Ho, K., Ho, S.S.H., Liu, S., Han, Y., Watson, J. G., Wang, G., Huang, R. (2014). Characterization and seasonal variations of levoglucosan in fine particulate matter in Xi’an, China, J.Air Waste Manage.Assoc., 1317-1327

Ho, K., Engling, G., Ho, S.S.H., Huang, R., Lai, S., Cao, J., Lee, Shuncheng (2014). Seasonal variations of anhydrosugars in PM2.5 in the Pearl River Delta Region, China, Tellus Series B-Chemical and Physical Meteorology, 66

2013
Xu, H. M., Tao, J., Ho, S.S.H., Ho, K. F., Cao, J., Li, N., Chow, J. C., Wang, G. H., Han, Y. M., Zhang, R. J., Watson, J. G., Zhang, J. Q. (2013). Characteristics of fine particulate non-polar organic compounds in Guangzhou during the 16th Asian Games: Effectiveness of air pollution controls, Atmos. Environ., 76, 94-101
https://www.sciencedirect.com/science/article/pii/S1352231013000046

2012
Dai, W. T., Ho, S.S.H., Cao, J. (2012). Characterization of Particulate-Phase High Molecular Weight Mono-Carbonyls (C# > 5) and Dicarbonyls in Urban Atmospheric of Xi’an, China, AAQR, 12 (5), 892-901

Dai, W. T., Ho, S.S.H., Ho, K. F., Liu, W. D., Cao, J., Lee, Shuncheng (2012). Seasonal and Diurnal Variations of Mono- and Di-Carbonyls in Xi’an, China, Atmos. Res., 113, 102-112

Huang, Y., Ho, S.S.H., Ho, K. F., Lee, S. C., Gao, Y., Feng, N. (2012). Optimization of solid-phase microextraction (SPME) to determine airborne biogenic volatile organic compounds (BVOCs): An application for measurement of household cleaning products, Anal. Methods, 4 (1), 277-283

Huang, Y., Lee, S. C., Ho, K. F., Ho, S.S.H., Cao, N. Y., Cheng, Y., Gao, Y. (2012). Effect of ammonia on ozone-initiated formation of indoor secondary products with emissions from cleaning products, Atmos. Environ., 59, 224-231

Ho, S.S.H., Ho, K. F., Lee, S. C., Cheng, Y., Yu, J. Z., Lam, K. M., Feng, N., Huang, Y. (2012). Carbonyl emissions from vehicular exhausts sources in Hong Kong, J. Air Waste Manage. Assoc., 62 (2), 221-234

Ho, S.S.H., Ho, K. F., Liu, S. X., Cao, J., Liu, W. D., Lee, S. C., Fung, K. K., Zhang, R. J., Huang, Y., Feng, N., Cheng, Y. (2012). Quantification of carbonate carbon in aerosol filter samples using a modified thermal/optical carbon analyzer (M-TOCA), Anal. Methods, 4, 2578-2584

2011
Ho, S.S.H., Chow, J. C., Watson, J. G., Ng, L., Kwok, Y., Ho, K., Cao, J. (2011). Precautions for in-injection port thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) applied to aerosol filter samples, Atmos.Environ., 1491-1496

2009
Ho, K., Ho, S.S.H., Lee, Shuncheng, Cheng, Y., Chow, J. C., Watson, J. G., Louie, P., Tian, L. (2009). Emissions of gas- and particle-phase polycyclic aromatic hydrocarbons (PAHs) in the Shing Mun Tunnel, Hong Kong, Atmos.Environ., 43, 6343-6351

2008
Chow, J. C., Watson, J. G., Chen, L.-W.A., Trimble, D. L., Ho, S.S.H., Veropoulos, K. (2008). Methods to assess carbonaceous aerosol sampling artifacts for IMPROVE and other long-term networks. Desert Research Institute

Chow, J. C., Doraiswamy, P., Watson, J. G., Chen, L.-W.A., Ho, S.S.H., Sodeman, D. (2008). Advances in integrated and continuous measurements for particle mass and chemical composition, J.Air Waste Manage.Assoc., 58 (2), 141-163

Ho, S.S.H., Yu, J., Chow, J. C., Zielinska, B. K., Watson, J. G., Sit, E., Schauer, J. (2008). Evaluation of an in-injection port thermal desorption-gas chromatography/mass spectrometry method for analysis of non-polar organic compounds in ambient aerosol samples, J.Chromatogr.A, 2, 1200, 217-227

2006
Chow, J. C., Watson, J. G., Chen, L.-W.A., Ho, S.S.H., Koracin, D. R., Zielinska, B. K., Tang, D., Perera, F., Cao, J., Lee, Shuncheng (2006). Exposure to PM2.5 and PAHs from the Tong Liang, China, epidemiological study, J.Env.Sci.Health Part A, A41, 517-542

Chow, J. C., Watson, J. G., Doraiswamy, P., Chen, L.-W.A., Sodeman, D. A., Ho, S.S.H., Kohl, S. D., Trimble, D. L., Voepel, H. E., Fung, K. K. (2006). Climate Change — Characterization of Black Carbon and Organic Carbon Air Pollution Emissions and Evaluation of Measurement Methods. Phase I: Method Intercomparison; Volume I: Interim Report, July 11, 2006, Prepared for The California Air Resources Board and the California Environmental Protection Agency

Conference Proceedings
2022
X. Wang, Gronstal, S. B., Lopez, B., Jung, H., Chen, L.-W.A., Ho, S.S.H., Chow, J. C., Watson, J. G., Frederickson, C., Mendez-Jimenez, D., Ma, T., Cobb, L., Yao, Q., Yoon, S., Herner, J. (2022). Concentration and Chemical Characteristics of PM2.5 and PM10 near California Highways with a Focus on Non-Tailpipe Emissions. 32nd CRC Real World Emissions Workshop: San Diego, California, March 13, 2022-March 17, 2022

Wang, X., Gronstal, S. B., Lopez, B., Jung, H., Chen, L.-W.A., Ho, S.S.H., Chow, J. C., Watson, J. G., Frederickson, C., Mendez-Jimenez, D., Ma, T., Cobb, L., Yao, Q., Yoon, S. (2022). Contributions of Non-tailpipe Emissions to PM2.5 and PM10 near Highways, 2022 National Ambient Air Monitoring Conference: Pittsburgh, PA, August 22, 2022-August 25, 2022

Wang, X., Gronstal, S. B., Lopez, B., Jung, H., Chen, L.-W.A., Ho, S.S.H., Chow, J. C., Watson, J. G., Frederickson, C., Mendez-Jimenez, D., Ma, T., Cobb, L., Yao, Q., Yoon, S. (2022). Characterization of PM2.5 and PM10 near California Highways with a Focus on Non-Tailpipe Emissions, 40th AAAR Annual Conference: Raleigh, NC, October 3, 2022-October 7, 2022

2019
Watson, J. G., X. Wang, Chow, J. C., Lee, Shuncheng, Chen, L.-W.A., Ho, K. F., Ho, S.S.H. (2019). Real-World Vehicle Emission Changes over the Past Decade in Hong Kong. Hong Kong Environmental Protection District: Hong Kong, China, May 24, 2019

Watson, J. G., X. Wang, Chow, J. C., Lee, Shuncheng, Chen, L.-W.A., Ho, K. F., Ho, S.S.H. (2019). Change in Hong Kong Toxic Motor Vehicle Emissions Between 2003 and 2015. Asian Aerosol Conference: Hong Kong, China, May 30, 2019

2017
Watson, J. G., X. Wang, Chow, J. C., Chen, L.-W.A., Ho, S.S.H., Lee, Shuncheng (2017). Evaluation of Vehicle Emission Changes in Hong Kong through Tunnel Studies. Academia Sinica Scientific Seminar: Taipei, Taiwan