Standard Historical Last Updated: Jan 23, 2013 Track Document
ASTM D3590-02(2006)

Standard Test Methods for Total Kjeldahl Nitrogen in Water

Standard Test Methods for Total Kjeldahl Nitrogen in Water D3590-02R06 ASTM|D3590-02R06|en-US Standard Test Methods for Total Kjeldahl Nitrogen in Water Standard new BOS Vol. 11.02 Committee D19
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Significance and Use

These test methods are useful for measuring organic nitrogen and ammoniacal nitrogen, which are essential growth nutrients.

Nitrogen compounds are widely distributed in the environment. Sources of nitrogen include surface-applied fertilizers, cleaning products, and drinking water treatment aids. Because nitrogen is a nutrient for photosynthetic organisms, it may be important to monitor and control discharge into the environment.


1.1 These test methods cover the determination of total Kjeldahl nitrogen. The following test methods are included:

Test Method A-Manual Digestion/Distillation8 to 14
Test Method B-Semiautomated Colorimetric Bertholt15 to 23

1.2 The analyst should be aware that precision and bias statements included may not necessarily apply to the water being tested.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Book of Standards Volume: 11.02
Developed by Subcommittee: D19.05
Pages: 8
DOI: 10.1520/D3590-02R06
ICS Code: 13.060.50