Product Details
- Product Number
- 206003
- Series
- DS-165
- Scale
- NO SCALE
- Alternate ID
- DS-165
- Authors
- WILLIAM A BATTAGLIN
- Version Date
- 01/01/2006
- Regions
- LA
- Countries
- USA
- Media
- Paper
- Format
- Bound
Additional Details
- Description
- Water-quality samples were collected from three sites in the lower Mississippi River in Louisiana during April 1991 through December 2003 by the U.S. Geological Survey and analyzed for selected herbicides, herbicide degradation products, and nutrients (nitrogen, phosphorus, and silica). When this study first began in April 1991, water samples were analyzed for selected herbicides and herbicide degradation products by gas chromatography/mass spectrometry. As the study progressed, there were changes and additions to the herbicide compounds analyzed, which resulted in lower analytical reporting levels or the quantification of additional herbicides or herbicide degradation products. Alachlor ethanesulfonic acid was analyzed by solid-phase extraction and enzyme-linked immunosorbent assay from 1993 through 1998. In March 1998, analyses for the acetamide degradation products, ethanesulfonic acid and oxanilic acid, by high-performance liquid chromatography with diode-array detection, were added. This method was replaced by liquid chromatography/mass spectrometry in August 1999.
- Two Sided
- Yes
- Pieces
- 1
- Languages
- English
Related Items
Estimation of Constituent Concentrations, Densities, Loads, and Yields in Lower Kansas River, Northeast Kansas, Using Regression Models and Continuous Water-Quality Monitoring, January 2000 Through December 2003
Nutrients in the Upper Mississippi River: Scientific information to support management decisions
Status of water levels and selected water-quality conditions in the Mississippi River valley alluvial aquifer in eastern Arkansas, 2000