| Abstract: | Recent reports have questioned the validity of dissolved trace element concentrations reported by the U.S. Geological Survey‘s National Stream Quality Accounting Network (NASQAN) as well as by other water-quality monitoring programs. To address these concerns and to evaluate the NASQAN protocols, the U.S. Geological Survey undertook the Mississippi River Methods Comparison Study. We report here the major results and implications of this study. In particular, we confirm the possible inaccuracy of previous NASQAN dissolved trace element data. The results suggest that all steps of the NASQAN protocol (sampling, processing, and analysis) require revision, though the sample filtration step appears to be of particular concern. |
| Genre: | Article |
| ProdID: | 70018789 |
| Citation Author: | Taylor, H. E. |
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| Citation End Page: | 1317 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental Science and Technology |
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| Citation Number Of Pages: | 5 |
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| Citation Search Results Text: | Mississippi river methods comparison study: Implications for water quality monitoring of dissolved trace elements; 1995; Article; Journal; Environmental Science and Technology; Taylor, H. E. |
| Citation Start Page: | 1313 |
| Citation Volume: | 29 |
| Citation Year: | 1995 |
| Type: | citation/reference |
| Text: | Mississippi river methods comparison study: Implications for water quality monitoring of dissolved trace elements; 1995; Article; Journal; Environmental Science and Technology; Taylor, H. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1995 00:00 -0600 |
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