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Mississippi river methods comparison study: Implications for water quality monitoring of dissolved trace elements

Environmental Science and Technology

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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.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mississippi river methods comparison study: Implications for water quality monitoring of dissolved trace elements
Series title:
Environmental Science and Technology
Volume
29
Issue:
5
Year Published:
1995
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Science and Technology
First page:
1313
Last page:
1317
Number of Pages:
5