Dr. Wenjian Lao

Dr. Wenjian Lao is a chemist who specializes in environmental trace analysis, enantioseparation of chiral organic pollutants and chiral stationary phase synthesis, and passive environmental sampling technology. His research focuses on passive sampling (SPME, PE, PMMA, and DGT) method development and application, analysis of legacy pollutants and contaminants of emerging concern (CECs) in the environment. Wayne began his career working on sampling and analysis of persistent organic pollutants in Beijing. He participated in many oil and gas geochemical prospecting projects as an analytical chemist and engineer in China. He developed a method for rapid analysis of free hydrocarbons by gas chromatography. He has studied the synthesis, fluorescence properties and biological activities of carbazole carboxylic acids, prepared chiral stationary phases, and developed chiral separation methods for selected organic pesticides. In SCCWRP, he established GC/MS method for analysis of pyrethroids, and fipronil in the environmental matrices. He made calibrations of passive samplers (SPME, PE, and PMMA) for POPs (PAHs, PCBs, OCPs) and CECs (PBDEs, pyrethroids, fipronil etc). He created models for calibration of water-unstable chemicals in seawater and for non-equilibrium exposure correction with performance reference compounds in passive sampling. He is working on analyses of cyanotoxin using SPE-HPLC-MS/MS, and microplastics using FTIR and Raman spectroscopy.

He received his B.S. in chemistry from Xi'an Petroleum Institute in 1990, and his M.S. and Ph.D. in analytic chemistry from Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, in 1996 and 2000 respectively. He joined SCCWRP in 2006.

Education

Ph.D., analytic chemistry, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences (CAS), 2000

M.S., analytic chemistry, LICP, CAS, 1996

B.S., chemistry, Xi'an Petroleum Institute, P.R. China, 1990

Professional Experience

Chemist, Southern California Coastal Water Research Project. Costa Mesa, CA. 2006-present

Postdoctoral Researcher, University of California, Riverside, Department of Environmental Sciences. Riverside, CA. 2005-2006

Postdoctoral Associate, Mississippi State University, Chemistry Department. Mississippi State, MS. 2003-2005

Research Associate, Vanderbilt University, Department of Chemistry. Nashville, TN. 2003

Research Scientist, The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Beijing, P.R. China. 2001-2003

Graduate Student Researcher, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences. Lanzhou, P.R. China. 1995-2000

Engineer, Analytical Chemistry Division, Geochemical Crews, BGP Inc., China National Petroleum Corporation. Zhuozhou, P.R. China. 1990-2002

Honors and Awards

Principal investigator, China Postdoctoral Science Foundation (2001)

The Peng Yingang Science and Technology Fellowship, Chinese Academy of Science (2000)

Achievement Award of Quality Control, China National Petroleum Corporation (1995)

Professional Societies and Certifications

Board of Directors, Southern California Regional Chapter of the Society of Environmental Toxicology and Chemistry (SoCal SETAC) (2008-2010)

Hydrology & Watershed Management Committee, American Water Resources Association

American Chemical Society

Sigma Xi

Selected Presentations and Conference Proceedings

Lao W, Parks A, Wenger E, Maruya M, Bay B, Carilli J and Leather J. 2019. Characterizing freely dissolved polychlorinated biphenyls and organochlorine pesticides in San Diego Bay (CA, USA) using polyethylene passive samplers. SETAC North America 40th Annual Meeting. November, Toronto, ON, CA.

Lao W, Kim G, and Maruya K, 2017. Developing passive sampling methods for bioavailable current-used pesticides in sediment. 253rd American Chemical Society National Meeting & Exposition. San Francisco, California.

Maruya, K., Lao, W., Kim, G.B., Hong, Y., Gan, J. 2016. Extending the scope of passive sampling for contaminated sediments: standardizing ex situ methods for determination of Cfree. 7th SETAC World Congress/SETAC North America 37th Annual Meeting. November, Orlando, FL.

Flavetta G., Lao W, K.A. Maruya. R.M. Burgess, L. Fernandez. 2016. Temporal and spatial monitoring of persistent organic pollutants on the Palos Verdes Shelf using two passive sampling methods. 7th SETAC World Congress/SETAC North America 37th Annual Meeting. November, Orlando, FL.

Hong Y, Lao W, David Tsukada D, Maruya K, Gan J. 2015. Evaluation of various polymers for equilibrium passive sampling of moderately hydrophobic emerging pollutants in water. Platform presentation at SETAC North America 36th annual meeting. November, Salt Lake City.

Lao W, Tsukada D, Maruya M. 2014. Incorporating performance reference compounds (PRCs) for passive sampling of organic contaminants using solid phase microextraction (SPME). Poster presentation at SETAC North America 35th annual meeting. November, Vancouver.

Lao W, Tsukada D, Maruya M. 2013. Correction for non-equilibrium measurement of hydrophobic organic chemicals using polyethylene passive samplers. Poster presentation at SETAC North America 34th annual meeting. November, Nashville.

Lao W, Tsukada D, Maruya M. 2012. Linkage between laboratory and field exposures of low-density polyethylene film as passive sampler in seawater. Poster presentation at SETAC North America 33rd annual meeting. November, Long Beach, CA.

Pirogovsky, M., A. Joyce, W. Lao, J. Haw, R. Adams, and K. Maruya. 2012. Calibrating Solid Phase Microextraction Passive Samplers for the In Situ Measurement of Contaminants in Southern California. American Chemical Society 243rd National Meeting & Exposition. San Diego, CA.

Joyce, A., M. Pirogovsky, W. Lao, J. Haw, R. Adams, and K. Maruya. 2012. Measurement of Polyethylene-Water partition Coefficients for In Situ Passive Sampling of Contaminants of Emerging Concern in Los Angeles, California. American Chemical Society 243rd National Meeting & Exposition. San Diego, CA.

Lao, W., L. Tiefenthaler, D. Greenstein, K.A. Maruya, S.M. Bay, and K.C. Schiff. 2011. Pyrethroids in Sediment from Southern California Coastal Environment-Bight’08 Survey. Presentation at the American Chemical Society 242nd National Meeting & Exposition. Denver, CO.

Adams, G.R, A.S. Joyce, M.S. Pirogovsky, W. Lao, J.F. Haw, and K.A. Maruya. 2011. Calibration and use of Polyethylene Passive Samplers for Quantifying Legacy and Emerging Contaminants of Concern at POTW Outfalls. Presentation at the Annual Water Environment Federation Technical Exhibition and Conference (WEFTEC). Los Angeles, CA.

Lao, W., L. Tiefenthaler, D. Greenstein, K.A. Maruya, S.M. Bay, and K.C. Schiff. 2011. Pyrethroids in Sediment from Southern California Coastal Environment-Bight’08 Survey. Presentation at SoCal SETAC Annual Meeting. Huntington Beach, CA.

Publications


Journal Articles

Mehinto, A.C., L.T. Hampton, D.E. Vidal-Dorsch, N. Garcia-Reyero, M.A. Arick, K.A. Maruya, W. Lao, C.D. Vulpe, M. Brown-Augustine, A. Loguinov, S.M. Bay. 2021. Transcriptomic response patterns of hornyhead turbot (Pleuronichthys verticalis) dosed with polychlorinated biphenyls and polybrominated diphenyl ethers. Comparative Biochemistry and Physiology - Part D: Genomics and Proteomics DOI:10.1016/j.cbd.2021.100822.

Lao, W. 2020. Fiproles as a proxy for ecological risk assessment of mixture of fipronil and its degradates in effluent-dominated surface waters. Water Research DOI:10.1016/j.watres.2020.116510.

Alava, J.J., P. Calle, A. Tirape, G. Biedenbach, O.A. Cadena, K. Maruya, W. Lao, W. Aguirre, P.J. Jimenez, G.A. Dominguez, G.D. Bossart, P.A. Fair. 2020. Persistent Organic Pollutants and Mercury in Genetically Identified Inner Estuary Bottlenose Dolphin (Tursiops truncatus) Residents of the Guayaquil Gulf, Ecuador: Ecotoxicological Science in Support of Pollutant Management and Cetacean Conservation. Frontiers in Marine Science DOI:10.3389/fmars.2020.00122.

Wang, S., W. Lao, H. Li, J. You. 2020. Measuring bioconcentration factors of sediment-associated fipronil in Lumbriculus variegatus using passive sampling techniques. Journal of Hazardous Materials DOI:10.1016/j.jhazmat.2020.122420.

Lao, W., K.A. Maruya, D. Tsukada. 2019. An exponential model based new approach for correcting aqueous concentrations of hydrophobic organic chemicals measured by polyethylene passive samplers. Science of the Total Environment 646:11-18.

Jonker, M.T.O., S.A. van der Heijden, D. Adelman, J.N. Apell, R.M. Burgess, Y. Choi, L.A. Fernandez, G.M. Flavetta, U. Ghosh, P.M. Gschwend, S.E. Hale, M. Jalalizadeh, M. Khairy, M.A. Lampi, W. Lao, R. Lohman, M.J. Lydy, K.A. Maruya, S.A. Nutile, A.M.P. Oen, M.I. Rakowska, D. Reible, T.P. Rusina, F. Smedes, Y. Wu. 2018. Advancing the Use of Passive Sampling in Risk Assessment and Management of Sediments Contaminated with Hydrophobic Organic Chemicals: Results of an International Ex Situ Passive Sampling Interlaboratory Comparison. Environmental Science and Technology 52:3574-3582.

Ulrich, E.M., P.L. TenBrook, L.M. McMillan, Q. Wang, W. Lao. 2018. Enantiomer-Specific Measurements of Current-Use Pesticides in Aquatic Systems. Environmental Toxicology and Chemistry 37:99-106.

Lin, K., W. Lao, Z. Lu, F. Jia, K.A. Maruya, J. Gan. 2017. Measuring freely dissolved DDT and metabolites in seawater using solid-phase microextraction with performance reference compounds. Science of the Total Environment 599-600:364-371.

Mehinto, A.C., D.R. VanDervort, W. Lao, G. He, M.S. Denison, S.M. Vliet, D.C. Volz, R.D. Mazor, K.A. Maruya. 2017. High throughput in vitro and in vivo screening of inland waters of Southern California. Environmental Science: Processes and Impacts 19:1142-1149.

Lao, W., Y. Hong, D. Tsukada, K.A. Maruya, J. Gan. 2016. A New Film-Based Passive Sampler for Moderately Hydrophobic Organic Compounds. Environmental Science and Technology 50:13470-13476.

Crago, J., E.G. Xu, A. Kupsco, F. Jia, A.C. Mehinto, W. Lao, K.A. Maruya, J. Gan, D. Schlenk. 2016. Trophic transfer and effects of DDT in male hornyhead turbot (Pleuronichthys verticalis) from Palos Verdes Superfund site, CA (USA) and comparisons to field monitoring. Environmental Pollution 213:940-948.

Maruya, K.A., W. Lao, D. Tsukada, D.W. Diehl. 2015. A passive sampler based on solid phase microextraction (SPME) for sediment-associated organic pollutants: Comparing freely-dissolved concentration with bioaccumulation. Chemosphere 137:192-197.

Joyce, A.S., M.S. Pirogovsky, R.G. Adams, W. Lao, D. Tsukada, C.L. Cash, J.F. Hawa, K.A. Maruya. 2015. Using performance reference compound-corrected polyethylene passive samplers and caged bivalves to measure hydrophobic contaminants of concern in urban coastal seawaters. Chemosphere 127:10-17.

Fernandez, L.A., W. Lao, K.A. Maruya, R.M. Burgess. 2014. Calculating the diffusive flux of persistent organic pollutants between sediments and the water column on the Palos Verdes Shelf Superfund Site using polymeric passive samplers. Environmental Science and Technology 48:3925-3934.

Greenstein, D.J., S.M. Bay, D.L. Young, S. Asato, K.A. Maruya, W. Lao. 2014. The use of sediment toxicity identification evaluation methods to evaluate clean up targets in an urban estuary. Integrated Environmental Assessment and Management 10:260-268.

Alvarez, D.A., K.A. Maruya, N.G. Dodder, W. Lao, E.T. Furlong, K.L. Smalling. 2014. Occurrence of contaminants of emerging concern along the California coast (2009-10) using passive sampling devices. Marine Pollution Bulletin 81:347-354.

Maruya, K.A., N.G. Dodder, C.L. Tang, W. Lao, D. Tsukada. 2014. Which coastal and marine environmental contaminants are truly emerging?. Environmental Science and Pollution Research 22:1644-1652.

Fernandez, L.A., W. Lao, K.A. Maruya, C. White, R.M. Burgess. 2012. Passive sampling to measure baseline dissolved persistent organic pollutant concentrations in the water column of the Palos Verdes shelf superfund site. Environmental Science and Technology 46:11937-11947.

Lao, W., J. Gan. 2012. Enantioselective degradation of warfarin in soils. Chirality 24:54-59.

Lao, W., D. Tsukada, K.A. Maruya. 2012. The effect of co-occurring polychlorinated biphenyls on quantitation of toxaphene in fish tissue samples by gas chromatography negative ion mass spectrometry. Journal of Chromatography A 1270:262-268.

Lao, W., L.L. Tiefenthaler, D.J. Greenstein, K.A. Maruya, S.M. Bay, K. Ritter, K.C. Schiff. 2012. Pyrethroids in southern California coastal sediments. Environmental Toxicology and Chemistry 31:1649-1656.

Lao, W., K.A. Maruya, D. Tsukada. 2012. A two-component mass balance model for calibration of solid-phase microextraction fibers for pyrethroids in seawater. Analytical Chemistry 84:9362-9369.

Lao, W., J. Gan. 2010. Characterization of warfarin unusual peak profiles on oligoproline chiral high performance liquid chromatography columns. Journal of Chromatography A 1217:6545-6554.

Lao, W., J. Gan. 2010. Temperature effects on a doubly tethered diproline chiral stationary phase: Hold-up volume, enantioselectivity and robustness. Journal of Separation Science 33:3052-3059.

Lao, W., D. Tsukada, D.J. Greenstein, S.M. Bay, K.A. Maruya. 2010. Analysis, occurrence, and toxic potential of pyrethroids, and fibronil in sediments from an urban estuary. Environmental Toxicology and Chemistry 29:843-851.

Ramezani, M.K., D.P. Oliver, R.S. Kookana, W. Lao, G. Gill, C. Preston. 2010. Faster degradation of herbicidally-active enantiomer of imidazolinones in soils. Chemosphere 79:1040-1045.

Sabin, L.D., K.A. Maruya, W. Lao, D.W. Diehl, D. Tsukada, K.D. Stolzenbach, K.C. Schiff. 2010. Exchange of polycyclic aromatic hydrocarbons among the atmosphere, water, and sediment in coastal embayments of southern California, USA. Environmental Toxicology and Chemistry 29:265-274.

Lao, W., J. Gan. 2009. Doubly tethered tertiary amide linked and ionically bonded diproline chiral stationary phases. Journal of Separation Science 32:2359-2368.

Lao, W., J. Gan. 2009. Evaluation of triproline and tri-a-methylproline chiral stationary phases retention and enantioseparation associated with hydrogen bonding. Journal of Chromatography A 1216:5020-5029.

Lao, W., J. Gan. 2008. Characterization of column hold-up volume with static and dynamic methods on an immobilized polysaccharide-based chiral stationary phase. Chromatographia 67:3-7.

Lao W., L. Cong, T. Hong, J. You, 2015. Spectroscopic Characterizations of Semiquinone Anion Radical Formation and Autosensitized Photooxidation for Elsinochrome A. Journal of the Chemical Society of Pakistan. 37 (1), 99-104.

Lao W., L. Cong, T. Hong, J. You. 2014. Photoinduced electron-transfer between Elsinochrome A and carbazole chemicals. Chemical Research. 25 (3), 260-263.

Lao W. 2013. Analysis of toxaphene and its eight congeners in sediment and fish tissue by gas chromatography-negative ion mass spectrometry. Chinese Journal of Chromatography. 31(7): 667-673.

Lao W. 2013. Thermodynamic and Extrathermodynamic Studies of Enantioseparation of Imidazolinone Herbicides on Chiralcel OJ Column. ISRN Chromatography. Article ID 460787, 9 pages. doi:10.1155/2013/460787.

Lao W., C. Song, J. You, Q. Ou. 2013. Fluorescence derivatization of alcohols by1.4-dimethyl-carbazole-9-yl-propionic acid. Chemical Research. 24 (1), 75-78.

Lao W., C. Song, J. You, Q. Ou. 2012. Fluorescence and ฆย-cyclodextrin inclusion properties of three carbazole-based dyes. Dyes and Pigments. 95, 619-626.

Lao W., L. Cong, T. Hong, J. You. 2012. Theoretical study on molecular configuration and intramolecular hydrogen bond of Elsinochrome A. Chemical Research. 23 (4), 85-90.

Lao W., C. Song, J. You, Q. Ou. 2012. Bifurcated hydrogen-bond in 3-Br-carbazole-9-yl-acetic acid crystal and its theoretical analysis. Chemical Research. 23 (5), 40-43.

Lao W., G. Arye, F. Ernst, Y.P. Xu, S. Bondarenko, D. Haver, J. Kabashima, D. Shibberu, and J. Gan. 2008. Reduction of Pyrethroid Runoff from A Commercial Nursery, in Synthetic Pyrethroids: Occurrence and Behavior in Aquatic Environments. American Chemical Society. ISBN: 978-0-8412-7433-4. 428-446.

Lao W., J. Gan. 2007. Hold-up volume and its application in estimating effective phase ratio and thermodynamic parameters on a polysaccharide-coated chiral stationary phase. Journal of Separation Sciences, 30, 2590-2597.

Lao W., J. Gan. 2006. Responses of enantioselective characteristics of imidazolinone herbicides and Chiralcel OJ column to temperature variations. Journal of Chromatography A. , 1131 (1-2) 74-84.

Lao W., J. Gan. 2006. High-performance liquid chromatographic separation of imidazolinone herbicide enantiomers and their methyl derivatives on polysaccharide-coated chiral stationary phases. Journal of Chromatography A. , 1117 (2), 184-193.

Zhang G., R. E. Rogers, W. T. Frenca and Lao W.. 2006. Investigation of microbial influences on seafloor gas-hydrate formations. Marine Chemistry. 103 (3-4) 359-369.

Zhao R., Lao W.ฃฌX. Xu. 2004. Headspace Liquid-Phase Microextraction of Trihalomethanes in Drinking Water and Their Gas-Chromatographic Determination. Talanta. 62,751-756.

Ma L., Lao, W., X. Wang, H. Liu, S. Chu, X. Xu. 2003. Analytical method for trace semi-volatile organic compounds in the soil of Beijing suburbs. Chinese Analytical Chemistry, 31(9), 1025-1029.

Liu X., Lao W., X. Bi, X. Xu, J. Zhao. 2002. Determination of organochlorine pesticides in abalone samples from Antarctic. Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, Peop. Rep. China. Chinese Analytical Chemistry 30(9), 1035-1037.

You J., Lao W.,; M. Huang, G. Wang. 2002. Study of molecular imprinted polymer as the adsorbent in the clean-up step after supercritical fluid extraction. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Peop. Rep. China. Chinese Analytical Chemistry 30(5), 518-521.

Bi Y., Lao W.,; Zhao, Suli; Li, Jubai. 2001. Synthesis and structure identification of partly hexenyl-substituted ฆย-cyclodextrin. Journal of Chemical reagents. 23(5), 284-285.

Lao W., Yu Hua Zhang, Yue Qi Liu, Qing Jin Wu, Zi Xing Huang, Qing Yu Ou, 2001.The Microwave-assisted Preparation and X-Ray Structure of 3-Bromo-9-carbazoly-N-acetic acid. Chinese Chemical Letter, 12(4) 321-324.

Lao W., J. You, H. Lu, S. Chen, X. Shen and Q. Ou, 2001.Study on the Synthesis, Properties and Biological Actitities of (9-Carbazoly)-carboxylic acids. Chemical Journal of Chinese Universities, 22(6) 955-957

Lao W., J. You, J. M.You, G. Wang, Q. Ou 2001.The Advances of fluorescence derivatization for alcohols and acids in high-performance liquid chromatography. Analysis and Testing Technology and Instruments. 7(1) 28-36.

You J, Lao W., G. Wang. 2001. Enantiomeric Separation of Pesticides by High Performance Capillary Electrophoresis. Analysis and Testing Technology and Instruments. 7(2) 100-104.

You J., Lao W., S. Chen, Q. Ou, 2001. Molecular Imprinted Polymer Used as An Additive for High Performance Capillary Electrophroesis. J. of Instrumental Analysis, 20(1) 19.

Zhang Y., Lao W., Y. Yin, Z. Huang, J. Wu, 2001. The Reaction of Octacarbonyldicobalt and Dipropargyl Malonate. Chinese Journal of Structure Chemistry, 20, 104

Zhang Y., J. Zhang, Lao W., Y. Yin, Z Huang and J.Wu, 2001. Synthesis, characterization and reactions of cluster complexes containing SeRuCoM (M = Mo or W) core and a functionally substituted cyclopentadienyl ligand. Journal of Organomet. Chemistry, 628(1) 123-130.

Zhang Y, Zhang J, Lao W., Y., Z. Huang and J.Wu, 2002. The reaction of octacarbonyldicobalt and dipropargyl terephthalate. Journal of coordination chemistry 2002 55(4) 373 จC380.

Zhang Y., Lao W., Y. Liu, Y. Yin, J. Wu and Z. Huang, 2001. Reaction of dipropargyl manolate, terephthalate with Co2(CO)8, Mo2Cp2(CO)4 and RuCo2(CO)11 gives the di or tetranuclear clusters. The crystal structure of [CH2(CO2CH2C2H-m)2][Co2(CO)6]2 and [p-(HC2CH2OCO)C6H4(CO2CH2C2H-m)][Co2(CO)6].Polyhedron, 20(9-10) 1107-1113.

Lao W., J.M. You, X. Sun, X. Kong, Q. Ou. 2000. Facile and Rapid Synthesis of 9H-Carbazole-9-Carboxylic Acids Under Microwave Irradiation. Synthetic Communications 30 (19) 3491.

Lao W., C. Xu, S. Ji, J.M.You, Q. Ou.. 2000. Electronic and vibrational spectra of series substituted Carbazole derivatives. Spectrochimica Acta, Part A. 56/11 2049-2060.

Lao W., Z. Yu, Y. Liu, and Q. Ou. 2000.Microwave-induced Fast Synthesis and Optical Resolution of 2-(9-Carbazoly)-Carboxylic Acids Enantiomers. Journal fจนr Praktische Chemie-Chemiker-Zeitung . 342 (6) 596.

Lao W., X. Sun, J.M. You , and Q. Ou. 2000. Microwave-assisted rapid preparation of substituted carbazole-9-carboxylic acids and their absorption and fluorescence spectroscopic characteristics. Monatshefte Fจนr Chemie/Chemical Monthly. 131,803.

Lao W., X. Sun, J.M. You, Q.Ou. 2000. Microwave-assisted preparation substituted carbazole-9-acetic/propoinice acid and fluorescence spectroscopic characteristics. Heterocyclic Communications 6 (1) 81.

Lao W., J.M. You, X. Sun, X. Kong, Q. Ou. 2000.Rapid Preparation of 1.4-Dimethyl-Carbazole-9-Carboxylic acid under Microwave Irradiation. Chinese Journal of Synthetic Chemistry. 8 (1) 6.

Lao W. J.M. You, Z. Yu, Q. Ou. 2000.On the synthesis of bromine substituted carbazoles and their normal phase HPLC separation. Journal of Chemical reagents 22(5) 260.

Y. Liu, Lao W., Y. Zhang, S. Jiang, L. Chen, 2000. Direct optical resolution of the enantiomers axially chiral compounds by HPLC on Cellulose tri-(3,5-dimethylphenylcarbamate) stationary phase. Chromatographia. 52(3/4) 190.

You J., Lao W., G. Wang, 1999. Analysis of organic pollutants in sewage by supercritical fluid extraction. Chromatographia. 49(7/8) 399.

You J.M., Lao W., You J., G. Wang, 1999.Characterization and application of acridine-9-N-acetyl-N-hydroxysuccinimide as a pre-column derivatization agent for fluorimetric detection of amino acids in liquid chromatography, Analyst, 124, 1755-1760

You J.M., Lao W., X.J.Fan, Q.Y.Ou, X.L.Jia, 1999. Study on the chromatographic behavior and inclusion constants of several new fluorescence agents using cyclodextrin as additives under the conditions of steady and dynamic state equilibrium with fluorescence detection, Chromatographia, 49, 95-104.

You J.M., X.J.Sun, Lao W., Q.Y.Ou, 1999. Determination of alcohols using condensation agent carbazole-9-acetyl-benzene-disulfonate by high performance liquid chromatography with pre-column fluorescence derivatization, Chromatographia, 49, 657-665.

You J.M., Lao W., Q. Ou, Xuejun Sun, 1999. Fluorescence properties of carbazole-N-(2-methyl) acetyl chloride and determination of amino compounds via high-performance liquid chromatography with pre-column fluorescence derivatization, J. Chromatogr. A, 848, 117-130.

You J.M., Lao W., X. Sun, Q. Ou, 1999. Carbazole-9-N-acetyl-N-hydroxysuccinimide (CAHS) as precolumn derivatization agent for fluorimetric detection of amino compounds with liquid chromatogrpahy, J.Liquid Chromatogr. & Related Technol. 22, 2907-2923.

X. Suo, Lao W., 1999. Study on the Geochemical Prospecting System of Near the Earth's Surface Free Hydrocarbons and Its Applied Effect. Petroleum Explorationist. 4(1) 35.

You J.M., Lao W., Q. Ou, X. Sun, 1999. A simple an d mild derivatization method for hydroxyl compounds using condensation agent carbazole-9-N-(2-methyl)-acetyl-benzene-disulfonate and its application for the determination of volatile alcohols from plasma by HPLC with fluorescence detection, Fresenius J Anal Chem , 365, 521-528.

You J.M., You J., Lao W., G. Wang, X. Jia, 1999. Fluorescence properites of carbazole-9-ylpropionic acid and its application to the determination of amines via HPLC with fluorescence detection, Analyst, 124, 281-288

You J.M., H. Sun, Lao W., Q. Ou, 1999. Fluorescence properties of carbazole-9-yl-acetyl chloride and its application for the simultaneous determination of amino acids and bigenic amines via liquid chromatography with fluorescence detection, Anal. Chim.Acta, 3 2, 51.

You J.M., X. Sun, Lao W., Q. Ou, D. Jiang, 1999. Derivatization of alcohols using acridone-9-N-acetyl-benzene-disulfonate as a condensation agent and its application for the determination of volatile alcohols in human plasma by liquid chromatography with fluorescence detection, Anal.Chim.Acta, 391, 43-55.

You J.M., X. Fan, Lao W., Q. Ou, Q. Zhu, 1999. High performance liquid chromatographic determination of biogenic amines and amino acids, Talanta, 48, 437.

You J.M., Lao W., Q. Ou, 1998. High-performance liquid chromatographic determination of amino compounds with carbazole-9-N(2-methyl)-acetic chloride. Chinese Chem. Lett. 9(7) 657-660

Lao W., G.Wang, 1995. The rapid analysis of free hydrocarbon by gas chromatography in field for oil and gas geochemical prospecting. Analysis and Testing Technology and Instruments. 1 (3) 28.

Technical Reports

Maruya, K.A., A.C. Mehinto, W. Lao, R. Sutton, T. Jabusch, J. Sun, D. Lin, J. Davis, R. Fadness. 2018. Pilot Monitoring of Constituents of Emerging Concern (CECs) in the Russian River Watershed (Region 1). Technical Report 1020. Southern California Coastal Water Research Project. Costa Mesa, CA.

Dodder, N., W. Lao, D. Tsukada, D.W. Diehl, K.C. Schiff. 2014. Areas of Special Biological Significance: Bioaccumulation Monitoring. Technical Report 816. Southern California Coastal Water Research Project. Costa Mesa, CA.

Schiff, K.C., R. Gossett, K. Ritter, L.L. Tiefenthaler, N. Dodder, W. Lao, K.A. Maruya. 2011. Southern California Bight 2008 Regional Monitoring Program: III. Sediment Chemistry. Technical Report 661. Southern California Coastal Water Research Project. Costa Mesa, CA.

Schiff, K.C., R. Gossett, K. Ritter, L.L. Tiefenthaler, N. Dodder, W. Lao, K.A. Maruya. 2011. Southern California Bight 2008 Regional Monitoring Program: III. Sediment Chemistry (Appendix A). Technical Report 661.A. Southern California Coastal Water Research Project. Costa Mesa, CA.

Schiff, K.C., R. Gossett, K. Ritter, L.L. Tiefenthaler, N. Dodder, W. Lao, K.A. Maruya. 2011. Southern California Bight 2008 Regional Monitoring Program: III. Sediment Chemistry (Appendix B). Technical Report 661.B. Southern California Coastal Water Research Project. Costa Mesa, CA.

Schiff, K.C., R. Gossett, K. Ritter, L.L. Tiefenthaler, N. Dodder, W. Lao, K.A. Maruya. 2011. Southern California Bight 2008 Regional Monitoring Program: III. Sediment Chemistry (Appendix C). Technical Report 661.C. Southern California Coastal Water Research Project. Costa Mesa, CA.

Schiff, K.C., R. Gossett, K. Ritter, L.L. Tiefenthaler, N. Dodder, W. Lao, K.A. Maruya. 2011. Southern California Bight 2008 Regional Monitoring Program: III. Sediment Chemistry (Appendix D). Technical Report 661.D. Southern California Coastal Water Research Project. Costa Mesa, CA.

Schiff, K.C., R. Gossett, K. Ritter, L.L. Tiefenthaler, N. Dodder, W. Lao, K.A. Maruya. 2011. Southern California Bight 2008 Regional Monitoring Program: III. Sediment Chemistry (Appendix E). Technical Report 661.E. Southern California Coastal Water Research Project. Costa Mesa, CA.

Bay, S.M., D.J. Greenstein, K.A. Maruya, W. Lao. 2010. Toxicity Identification Evaluation of Sediment (Sediment TIE) in Ballona Creek Estuary: Final Report. Technical Report 634. Southern California Coastal Water Research Project. Costa Mesa, CA.

Peng, J., K.A. Maruya, K.C. Schiff, D. Tsukada, D.W. Diehl, W. Lao, J. Gan, E. Zeng. 2007. Organochlorine pesticides and other trace organic contaminants in the Upper Newport Bay watershed. Technical Report 512. Southern California Coastal Water Research Project. Costa Mesa, CA.

Annual Report Articles

Greenstein, D.J., S.M. Bay, D. Young, S. Asato, K.A. Maruya, W. Lao. 2013. The use of sediment toxicity identification evaluation methods to evaluate clean-up targets in an urban estuary. in: K.C. Schiff, K. Miller (eds.), Southern California Coastal Water Research Project 2013 Annual Report pp. 169-181. Southern California Coastal Water Research Project. Costa Mesa, CA.

Alvarez, D., K.A. Maruya, N.G. Dodder, W. Lao, E. Furlong, K. Smalling. 2013. Occurrence of contaminants of emerging concern along the California coast (2009-10) using passive sampling devices. in: K.C. Schiff, K. Miller (eds.), Southern California Coastal Water Research Project 2013 Annual Report pp. 49-59. Southern California Coastal Water Research Project. Costa Mesa, CA.

Fernandez, L.A., W. Lao, K.A. Maruya, C. White, R.M. Burgess. 2012. Passive sampling to measure background dissolved persistent organic pollutant concentrations in the water column of the Palos Verdes Shelf Superfund site. in: S.B. Weisberg, K. Miller (eds.), Southern California Coastal Water Research Project 2012 Annual Report pp. 49-60. Southern California Coastal Water Research Project. Costa Mesa, CA.

Lao, W., D. Tsukada, K.A. Maruya. 2012. The effect of co-occurring polychlorinated biphenyls on quantitation of toxaphene in fish tissue samples by gas chromatography negative ion mass spectrometry. in: S.B. Weisberg, K. Miller (eds.), Southern California Coastal Water Research Project 2012 Annual Report pp. 61-72. Southern California Coastal Water Research Project. Costa Mesa, CA.

Lao, W., K.A. Maruya, D. Tsukada. 2012. A two-component mass balance model for calibration of solid-phase microextraction fibers for pyrethroids in seawater. in: S.B. Weisberg, K. Miller (eds.), Southern California Coastal Water Research Project 2012 Annual Report pp. 85-98. Southern California Coastal Water Research Project. Costa Mesa, CA.

Sabin, L.D., K.A. Maruya, W. Lao, D.W. Diehl, D. Tsukada, K.D. Stolzenbach, K.C. Schiff. 2011. A pilot study of air-water exchange of organochlorine compounds at three coastal estuaries in southern California. in: K.C. Schiff, K. Miller (eds.), Southern California Coastal Water Research Project 2011 Annual Report pp. 71-82. Southern California Coastal Water Research Project. Costa Mesa, CA.

Lao, W., L.L. Tiefenthaler, D.J. Greenstein, K.A. Maruya, S.M. Bay, K. Ritter, K.C. Schiff. 2011. Pyrethroids in southern California coastal sediments. in: K.C. Schiff, K. Miller (eds.), Southern California Coastal Water Research Project 2011 Annual Report pp. 249-260. Southern California Coastal Water Research Project. Costa Mesa, CA.

Lao, W., J. Gan. 2010. Temperature effects on a doubly tethered diproline chiral stationary phase: Hold-up volume, enantioselectivity and robustness. in: S.B. Weisberg, K. Miller (eds.), Southern California Coastal Water Research Project 2010 Annual Report pp. 57-66. Southern California Coastal Water Research Project. Costa Mesa, CA.

Sayre, J.M., R.G. Adams, W. Lao, K.A. Maruya. 2010. Comparing solid phase microextraction and polyethylene passive samplers for measuring ultra-low aqueous concentrations of regulated organic pollutants. in: S.B. Weisberg, K. Miller (eds.), Southern California Coastal Water Research Project 2010 Annual Report pp. 45-56. Southern California Coastal Water Research Project. Costa Mesa, CA.

Lao, W., D. Tsukada, D.J. Greenstein, S.M. Bay, K.A. Maruya. 2009. Analysis, occurrence, and toxic potential of pyrethroids and fipronil in sediments from the Ballona Creek estuary. in: K.C. Schiff, K. Miller (eds.), Southern California Coastal Water Research Project 2009 Annual Report pp. 277-289. Southern California Coastal Water Research Project. Costa Mesa, CA.

Sabin, L.D., K.A. Maruya, W. Lao, D.W. Diehl, D. Tsukada, K.D. Stolzenbach, K.C. Schiff. 2008. Exchange of polycyclic aromatic hydrocarbons between the atmosphere, water, and sediment in southern California coastal embayments. in: S.B. Weisberg, K. Miller (eds.), Southern California Coastal Water Research Project 2008 Annual Report pp. 51-64. Southern California Coastal Water Research Project. Costa Mesa, CA.