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Analytical properties of some commercially available nitrate reductase enzymes evaluated as replacements for cadmium in automated, semiautomated, and manual colorimetric methods for determination of nitrate plus nitrite in water [研究报告]
U.S. Geological Survey. 2013-01-01
Patton, Charles J. cjpatton@usgs.gov;  Kryskalla, Jennifer R.
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Assessing total nitrogen in surface-water samples--precision and bias of analytical and computational methods [研究报告]
U.S. Geological Survey. 2013-01-01
Rus, David L. dlrus@usgs.gov;  Patton, Charles J. cjpatton@usgs.gov;  Mueller, David K. mueller@usgs.gov;  Crawford, Charles G. cgcrawfo@usgs.gov
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