Index Catalog // ScholarsArchive@OSU

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:: Preservation study of 1 ppb CH 3 HgC1 with no preserving reagents 86 25 Calibration curve for equal Hg(II

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:: concentrations and 0y, Eu, and U were detemined at sub no/m1 concentrations. In the third application of the

A critical comparison of methods for the determination of phytoplankton chlorophyll

Creator:: Salinas, John T.
Abstract:: The concentration of chlorophyll in natural bodies of water is commonly determined as a means to rapidly estimate the phytoplankton biomass. The literature gives numerous warnings, however, as to the problems involved with accurately determining chlorophyll concentrations. The author's work at Crater Lake, Oregon enticed him to explore critically the...
Resource Type:: Masters Thesis
Full Text:: Cronemiller Lake water. No difference in filter retention efficiency at the 95% confidence level was observed

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:: arsenic. In the creek water, no As(III) was detected but As(V) was detected at a level of 8 gg/L. Fourth

Development of methodology and instrumentation for determination of chloroform in water

Creator:: Yang, Ying, 1969-
Resource Type:: Dissertation
Full Text:: Trihalomethanes in Drinking Water, Environmental Protection Agency, EPA-600/2-81-156, Cincinnati, 1981. 8. Report

Design, construction and application of an instrument for simultaneous measurement of molecular fluorescence, absorbance and chemiluminescence

Creator:: Yappert, Marta Cecilia
Abstract:: An instrument was constructed to measure molecular fluorescence (FL) or chemiluminescence (CL) and absorbance (ABS) simultaneously. The lower, middle, and upper portions of the test solution are probed to obtain ABS, FL, and CL data. Optical fibers are used extensively. The ABS and FL or CL spectra are acquired in...
Resource Type:: Dissertation
Full Text:: energy which excites the molecules. In CL, no external source of radiation is present. Chemical energy

Analytical chemiluminescence measurements and instrumentation

Creator:: Marino, Dean Frank
Resource Type:: Dissertation
Full Text:: show there is no S/N advantage in taking peak area measurements unless a cooled PMTPC system is used

A microcomputer automated anodic stripping voltammetric analyzer for trace heavy metal speciation

Creator:: Dewald, Lamar Robert
Abstract:: An automated instrument based on a single-board microcomputer was developed for use in voltammetric analyses. Operator input of numerous experiment parameters allows any type of voltammetric analysis to be implemented and multiple scans to be run unattended. A three operational amplifier potentiostat is used to control the cell voltage and...
Resource Type:: Dissertation
Full Text:: total concentration or activities of all metals CM], ligands CL] and metal complexes NO, conditional

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
Full Text:: been studied minimally. To our best knowledge, no prior work relating to the hydrolysis

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

Creator:: Lemmon, Teresa L.
Resource Type:: Dissertation
Full Text:: species in the solution (e.g., Fe(II) concentration above 30 pM and no detectable Cr(VI) present if

ScholarsArchive@OSU

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

Microcomputer controlled chemical and radiochemical separations and analysis

A critical comparison of methods for the determination of phytoplankton chlorophyll

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 of methodology and instrumentation for determination of chloroform in water

Design, construction and application of an instrument for simultaneous measurement of molecular fluorescence, absorbance and chemiluminescence

Analytical chemiluminescence measurements and instrumentation

A microcomputer automated anodic stripping voltammetric analyzer for trace heavy metal speciation

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

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

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