Index Catalog // ScholarsArchive@OSU

Part I : development and application of an arsenic speciation technique using ion-exchange solid phase extraction coupled with GFAAS ; Part II : investigation of zinc amalgam as a reductant

Creator:: Bos, Mark C.
Abstract:: Two related techniques, based upon ion-exchange solid phase extraction, have been developed for the determination of arsenic speciation. The inorganic arsenic species arsenite (As(III)) and arsenate (As(V)) are separated by anion-exchange and detected with graphite furnace atomic absorption spectrophotometry (GFAAS) with a nickel matrix modifier. The first separation technique, which...
Resource Type:: Masters Thesis
Full Text:: Dr. John Westall for all the insight. A huge thanks to Dr. Phil Whanger for the use of his

Development and evaluation of sampling techniques, instrumentation, and pyridine derivative reagents for fluorometric determination of chloroform and TCE in water with a portable fluorometer

Creator:: Prayoonpokarach, Sanchai
Abstract:: A novel, portable, filter fluorometer was developed for the determination of chloroform and TCE at environmentally-relevant levels when coupled with improved sampling techniques and reagents. Reagents selective for the TCE or chloroform convert these toxic species into fluorescent species that can be monitored. The fluorometer is based on LED excitation...
Resource Type:: Dissertation
Full Text:: VOA vial filled with water sample and the vial was shaken for about 45 s allowing gas-phase TCE to

Applications of redox indicators for evaluating redox conditions in environmental samples

Creator:: Jones, Brian Dion
Resource Type:: Dissertation

The development and characterization of miniature spectrometers for measuring the redox status of environmental samples

Creator:: Cantrell, Kevin
Abstract:: A spectrometer, here denoted a Simple, Low-power, Inexpensive. Microcontroller-based or SLIM spectrometer. was developed that exploits the small size and low cost of solid-state electronic devices. This approach results in customizable spectrometers that are considerably less expensive and smaller than traditional instrumentation. The performance of the SLIM spectrometer was evaluated...
Resource Type:: Dissertation
Full Text:: . I would like to thank Dr. John Baham and Jan Wiederhold for their help with the sub- surface work

Microcomputer controlled chemical and radiochemical separations and analysis

Creator:: Bennett, Casey Wayne
Abstract:: An automated radiochemical flow analysis (ARFA) system was developed which integrates chemical and radiochemical techniques into one system through the use of a microcomputer. The operator, through the microcomputer, controls valves and pumps to transfer sample and reagent solutions to counting loops, ion exchange columns and holdup reservoirs. A Ge(Li)...
Resource Type:: Dissertation
Full Text:: SAMPLE TRANSFER LINE SAMPLE VIAL*. kni Pfo':v11 PLUNGER ASSEMBLY ASPIRATION PUMP SOURCE RESERVOIR

Development of chemostats and use of redox indicators for studying redox transformations in biogeochemical matrices

Creator:: Lemmon, Teresa L.
Resource Type:: Dissertation
Full Text:: wish to thank my husband John for his constant encouragement and faith in me, and my family for all

Development of methodology and instrumentation for determination of chloroform in water

Creator:: Yang, Ying, 1969-
Resource Type:: Dissertation

Abiotic and biological transformation of TBOS and TKEBS, and their role in the biological transformation of TCE and c-DCE

Creator:: Vancheeswaran, Sanjay
Abstract:: At Site-300, Lawrence Livermore National Laboratory (LLNL), CA, trichloroethene (TCE) is present along with tetraalkoxysilanes such as tetrabutoxysilane (TBOS) and tetrakis(2-ethylbutoxy) silane (TKEBS), as subsurface contaminants. Intrinsic transformation of TCE to cis-dichloroethene (c-DCE) was observed in the groundwater at locations co-contaminated with TBOS or TKEBS. Attenuation of TBOS and TKEBS...
Resource Type:: Masters Thesis

Continuous sample flow and mercury (II) speciation studies utilizing the cold vapor atomic absorption method for mercury determination

Creator:: Oda, Carl Ekio
Resource Type:: Masters Thesis
Full Text:: financial support in the form of a Nicholas Tarter Fellowship is acknowledged. TABLE OF CONTENTS Page

Fiber optic sensors and spectrometry for the detection of volatile gem-polyhalogenated hydrocarbons

Creator:: Louch, Jeff
Abstract:: A fiber optic fluorometer utilizing a double-fiber optic probe was constructed. The absolute fluorescence signal and effective collection efficiency are approximately one fifth those of typical cuvette fluorometers and agree with those predicted by theory. A quinine sulfate calibration curve shows linearity from a detection limit of 10 pg/mL to...
Resource Type:: Dissertation

ScholarsArchive@OSU

Part I : development and application of an arsenic speciation technique using ion-exchange solid phase extraction coupled with GFAAS ; Part II : investigation of zinc amalgam as a reductant

Development and evaluation of sampling techniques, instrumentation, and pyridine derivative reagents for fluorometric determination of chloroform and TCE in water with a portable fluorometer

Applications of redox indicators for evaluating redox conditions in environmental samples

The development and characterization of miniature spectrometers for measuring the redox status of environmental samples

Microcomputer controlled chemical and radiochemical separations and analysis

Development of chemostats and use of redox indicators for studying redox transformations in biogeochemical matrices

Development of methodology and instrumentation for determination of chloroform in water

Abiotic and biological transformation of TBOS and TKEBS, and their role in the biological transformation of TCE and c-DCE

Continuous sample flow and mercury (II) speciation studies utilizing the cold vapor atomic absorption method for mercury determination

Fiber optic sensors and spectrometry for the detection of volatile gem-polyhalogenated hydrocarbons

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