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'''Total Kjeldahl Nitrogen''' or TKN is the sum of organic [[nitrogen]], [[ammonia]] (NH<sub>3</sub>), and [[ammonium]] (NH<sub>4</sub><sup>+</sup>) in the chemical analysis of soil, water, or wastewater (e.g. sewage treatment plant effluent). To calculate Total Nitrogen (TN), the concentrations of nitrate-N and nitrite-N are determined and added to TKN. |
'''Total Kjeldahl Nitrogen''' or TKN is the sum of organic [[nitrogen]], [[ammonia]] (NH<sub>3</sub>), and [[ammonium]] (NH<sub>4</sub><sup>+</sup>) in the chemical analysis of soil, water, or wastewater (e.g. sewage treatment plant effluent). To calculate Total Nitrogen (TN), the concentrations of nitrate-N and nitrite-N are determined and added to TKN. |
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TKN is determined in the same manner as [[nitrogen|organic nitrogen]], except that the ammonia is not driven off before the digestion step. |
TKN is determined in the same manner as [[nitrogen|organic nitrogen]], except that the ammonia is not driven off before the digestion step. - wrong! |
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It is named after [[Johan Kjeldahl]]. |
It is named after [[Johan Kjeldahl]]. |
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Revision as of 01:00, 9 August 2011
Total Kjeldahl Nitrogen or TKN is the sum of organic nitrogen, ammonia (NH3), and ammonium (NH4+) in the chemical analysis of soil, water, or wastewater (e.g. sewage treatment plant effluent). To calculate Total Nitrogen (TN), the concentrations of nitrate-N and nitrite-N are determined and added to TKN.
TKN is determined in the same manner as organic nitrogen, except that the ammonia is not driven off before the digestion step. - wrong!
It is named after Johan Kjeldahl.
See also
References
- Wastewater Engineering: Treatment and Reuse, Metcalf & Eddy
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