U.S. Geological Survey Toxic Substances
Hydrology Program--Proceedings of the Technical Meeting, Colorado Springs,
Colorado, September 20-24, 1993, Water-Resources Investigations Report 94-4015
 
Section E - Methods Development
Section E presents the development of methods to analyze and collect
water samples, and to investigate transport processes. These papers discuss,
for example, the development of a new method to collect sediment cores without
loss of sample, new analytical methods to measure the concentrations of
pesticides and pesticide metabolites in water, and the use of nitrogen isotopes
to study the subsurface transport of nitrogen.
Contents
- Sampling Borehole Flow to Quantify Aquifer Cross-Contamination
by Volatile Organic Compounds [Abstract Only] by Ronald A. Sloto
- A Sample-Freezing Drive Shoe for a Wireline-Piston
Core Sampler [Abstract Only] by Fred Murphy and W.N. Herkelrath
- Determination of Surface Area of Soil Components
by Sorption of Nitrogen and Ethylene Glycol Monoethyl Ether Vapors and Evaluation
of Adsorption, Partition and Cation Solvation Processes [Abstract Only]
by Cary T. Chiou and David W. Rutherford
- Isolation of Lipophilic Organic Contaminants
Along the Upper Mississippi River Using A Semipermeable Membrane Device
[Abstract Only] by Geoffrey S. Ellis and Colleen E. Rostad
- Measurement of Concentrations of Alachlor
and Its Ethanesulfonic Acid Metabolite in Water by Solid-Phase Extraction
and Enzyme-Linked Immunosorbent Assay [Abstract Only] by Diana S. Aga,
E. Michael Thurman, and Michael L. Pomes
- Isocratic Separation of Alachlor Ethanesulfonic
Acid, Alachlor Oxoacetic Acid, and Hydroxyatrazine by Reversed-Phase Liquid
Chromatography [Abstract Only] by Michael L. Pomes, Douglas F. Holub,
Diana S. Aga, and E.M. Thurman
- Use of 15N to Trace Movement of
Nitrogen Fertilizer at a Field Plot [Abstract Only] by Dale W. Blevins,
Donald H. Wilkison, Steven R. Silva, and Brian P. Kelly
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