Search Results - "Draper, William M"

Lowering detection limits for 1,2,3-trichloropropane in water using solid phase extraction coupled to purge and trap sample introduction in an isotope dilution GC-MS method by Liao, Wenta, Ghabour, Miriam, Draper, William M., Chandrasena, Esala

“…Purge and trap sample introduction (PTI) has been the premier sampling and preconcentration technique for gas chromatographic determination of volatile organic…”
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Organic Chemical Contaminants in Water System Infrastructure Following Wildfire by Draper, William M, Li, Na, Solomon, Gina M, Heaney, Yvonne C, Crenshaw, Reese B, Hinrichs, Richard L, Chandrasena, R. Esala P

“…Wildfires have destroyed multiple residential communities in California in recent years. After fires in 2017 and 2018, high concentrations of benzene and other…”
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Identification of volatile and semivolatile compounds in chemical ionization GC-MS using a mass-to-structure (MTS) Search Engine with integral isotope pattern ranking by Liao, Wenta, Draper, William M

“…The mass-to-structure or MTS Search Engine is an Access 2010 database containing theoretical molecular mass information for 19,438 compounds assembled from…”
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Biological Monitoring:  Exquisite Research Probes, Risk Assessment, and Routine Exposure Measurement by Draper, William M

“…Draper reviews developments in the past two years in the field of industrial hygiene, focusing on advancements in biological monitoring…”
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Identification of Unknowns in Atmospheric Pressure Ionization Mass Spectrometry Using a Mass to Structure Search Engine by Liao, Wenta, Draper, William M, Perera, S. Kusum

“…This study evaluates a new model for identifying unknown compounds in atmospheric pressure ionization mass spectrometry based on a mass-to-structure (MTS)…”
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Direct determination of dialkyl phosphates by strong anion-exchange liquid chromatography/atmospheric pressure chemical ionization mass spectrometry using a quadrupole ion trap instrument by Draper, William M., Behniwal, Paramjit, Wijekoon, Donald

“…The direct determination of dialkyl phosphates (DAPs) in water by strong anion‐exchange (SAX) liquid chromatography/atmospheric pressure chemical ionization…”
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Electrolyte-Induced Ionization Suppression and Microcystin Toxins: Ammonium Formate Suppresses Sodium Replacement Ions and Enhances Protiated and Ammoniated Ions for Improved Specificity in Quantitative LC-MS-MS by Draper, William M, Xu, Dadong, Perera, S. Kusum

“…This study examines the effects of electrolytes on microcystin (MC) electrospray ionization (ESI) mass spectrometry and quantitative LC-MS-MS. Sodium…”
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Near UV quantum yields for rotenone and piperonyl butoxide by Draper, William M

“…Rotenone and piperonyl butoxide (PBO) mixtures, so-called "synergized" rotenone, are invaluable in fisheries management where they are used to protect the…”
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Electrospray Liquid Chromatography Quadrupole Ion Trap Mass Spectrometry Determination of Phenyl Urea Herbicides in Water by Draper, William M

“…Phenyl urea herbicides were determined in water by electrospray quadrupole ion trap liquid chromatography−mass spectrometry (ES-QIT-LC-MS). Over a wide…”
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Multiresidue HPLC Methods for Phenyl Urea Herbicides in Water by Ruberu, Shiyamalie R, Draper, William M, Perera, S. Kusum

“…High-performance liquid chromatography (HPLC) methods for the determination of phenyl urea herbicides in water are described. The target compounds include…”
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Atmospheric Pressure Ionization LC-MS-MS Determination of Urushiol Congeners by Draper, William M, Wijekoon, Donald, McKinney, Michael, Behniwal, Paramjit, Perera, S. Kusum, Flessel, C. Peter

“…This paper describes atmospheric pressure ionization (API) LC-MS-MS determination of urushiols, 3-n-alkenyl- and -alkyl-substituted catechols responsible for…”
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Photochemical generation of superoxide radical anion in water by Draper, William M, Crosby, Donald G

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Trace-level determination of 1,4-dioxane in water by isotopic dilution GC and GC-MS by Draper, W M, Dhoot, J S, Remoy, J W, Perera, S K

“…The volatile and polar solvent 1,4-dioxane has recently been reported as a contaminant of ground and surface waters, establishing the need to determine this…”
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Industrial Hygiene Chemistry:  Keeping Pace with Rapid Change in the Workplace by Draper, William M, Ashley, Kevin, Glowacki, Clifford R, Michael, Paul R

“…Draper et al provide a critical overview of the published research in industrial hygiene chemistry for the years 1997 and 1998…”
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Optimizing nitrogen-phosphorus detector gas chromatography for pesticide analysis by Draper, William M

“…The goal of this work was to improve the performance of the nitrogen-phosphorus detector gas chromatograph (NPD-GC) for multiresidue pesticide analysis. Severe…”
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Rate constants for metam-sodium cleavage and photodecomposition in water by Draper, William M, Wakeham, Diane E

“…Metam-sodium is a soil fumigant with many important uses in agriculture. In soil the compound is rapidly and efficiently converted to methyl isothiocyanate…”
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Speciation and quantitation of Aroclors based on PCB congener data: application to California mussels and white croaker by Draper, William M, Koszdin, Shelli

“…A procedure for speciation and quantitation of Aroclors in capillary gas-liquid chromatography electron capture detector (GC-ECD) chromatograms is described…”
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Detection limits of organic contaminants in drinking water by Draper, William M., Dhoot, Jagdev S., Dhaliwal, Joginder S., Remoy, John W., Perera, S. Kusum, Baumann, Frank J.

“…Better control of MDL determination will substantially reduce interlaboratory variation. This article examines some of the experimental variables that can…”
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Determination of diesel fuel and motor oil in water and wastes by a modified diesel-range organics total petroleum hydrocarbon method by Draper, W.M. (California Department of Health Services, Berkeley, CA.)

“…The American Petroleum Institute method for determination of diesel-range total petroleum hydrocarbon (TPH) by gas-liquid chromatography with flame ionization…”
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Hydrogen peroxide and hydroxyl radical: intermediates in indirect photolysis reactions in water by Draper, William M, Crosby, Donald G

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