An improved method of chemical analysis for low levels of nitrogen in forest streams or in rainwater.

Elly E. Holcombe; Duane G. Moore; Richard L. Fredriksen

doi:10.2737/PNW-RN-449

Treesearch

An improved method of chemical analysis for low levels of nitrogen in forest streams or in rainwater.

Informally Refereed

Authors:

Elly E. Holcombe, Duane G. Moore, Richard L. Fredriksen

Year:

1986

Type:

Research Note

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RN-449

Source:

Res. Note. PNW-RN-449. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p

Download (PDF 309 KB)

Download (PDF 309 KB): https://research.fs.usda.gov/download/treesearch/25067.pdf

Abstract

A modification of the macro-Kjeldahl method that provides increased sensitivity was developed for determining very low levels of nitrogen in forest streams and in rain-water. The method is suitable as a routine laboratory procedure. Analytical range of the method is 0.02 to 1.5 mg/L with high recovery and excellent precision and ac-curacy. The range can be increased to include higher levels of nitrogen by dilution of samples at time of Nesslerization, or by using smaller volumes of samples at the start of the analysis.

Keywords

Chemical analysis, nitrogen, water analysis, laboratory methods

Citation

Holcombe, Elly E.; Moore, Duane G.; Fredriksen, Richard L. 1986. An improved method of chemical analysis for low levels of nitrogen in forest streams or in rainwater. Res. Note. PNW-RN-449. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p