U.S. Geological Survey nutrient preservation experiment nutrient concentration data for surface-, ground-, and municipal-supply water samples and quality-assurance samples

by Patton, Charles J.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : Open-File Reports Section/ESIC [distributor], 1995

Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory evaluation of alkaline persulfate digestion as an alternative to Kjeldahl digestion for determin...

by Patton, Charles J.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : U.S. Geological Survey, Branch of Information Services [distributor], 2003

U.S. Geological Survey nutrient preservation experiment : experimental design, statistical analysis, and interpretation of analytical results

by Patton, Charles J.,
Published: U.S. Geological Survey, U.S. Dept. of the Interior, 1999

Analytical properties of some commercially available nitrate reductase enzymes evaluated as replacements for cadmium in automated, semiautomated, and manual colorimetric methods fo...

by Patton, Charles J.,
Published: U.S. Department of the Interior, U.S. Geological Survey, 2013

Automated, colorimetric methods for determination of nitrate plus nitrite, nitrite, ammonium and orthophosphate ions in natural water samples

by Antweiler, Ronald C.
Published: U.S. Geological Survey : Books and Open-File Reports Section [distributor], 1996