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Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Ammonium Plus Organic Nitrogen by a Kjeldahl Digestion Method and an Automated Photometric Finish that Includes Digest Cleanup by Gas Diffusion

Incorporation

Federal Agency

Environmental Protection Agency

CFR Citation

40 CFR 136.3(b)(33)(xi)

CFR Link

http://www.gpo.gov/fdsys/pkg/CFR-2014-title40-vol23/xml/CFR-2014-title40-vol23-…

Document Number

USGS Open File Report (OFR) 00-170

Document Edition

2000

SDO

U.S. Geological Survey

Standard Number Link

http://www.usgs.gov/pubprod/

Record Source

legacy system

SIBR Legacy Id

40311