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

Open-File Report 93-638

By:
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Abstract

The apparatus and methods used for the automatic, colorimetric determinations of dissolved nutrients (nitrate plus nitrite, nitrite, ammonium and orthophosphate) in natural waters are described. These techniques allow for the determination of nitrate plus nitrite for the concentration range 0.02 to 8 mg/L (milligrams per liter) as N (nitrogen); for nitrite, the range is 0.002 to 1.0 mg/L as N; for ammonium, the range is 0.006 to 2.0 mg/L as N; and for orthophosphate, the range is 0.002 to 1.0 mg/L as P (phosphorus). Data are presented that demonstrate the accuracy, precision and quality control of the methods.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Automated, colorimetric methods for determination of nitrate plus nitrite, nitrite, ammonium and orthophosphate ions in natural water samples
Series title:
Open-File Report
Series number:
93-638
Edition:
-
Year Published:
1996
Language:
ENGLISH
Publisher:
U.S. Geological Survey :
Description:
iv, 23 p. :ill. ;28 cm.