Automated, colorimetric methods for determination of nitrate plus nitrite, nitrite, ammonium and orthophosphate ions in natural water samples
Open-File Report
93-638
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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.
Suggested Citation
Antweiler, R.C., Patton, C.J., and Taylor, H.E., 1996, Automated, colorimetric methods for determination of nitrate plus nitrite, nitrite, ammonium and orthophosphate ions in natural water samples: U.S. Geological Survey Open-File Report 93-638, iv, 23 p., https://doi.org/10.3133/ofr93638.
ISSN: 2331-1258 (online)
| 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 |
| DOI | 10.3133/ofr93638 |
| Year Published | 1996 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | iv, 23 p. |