Question:
In water and wastewater analysis, Kjeldahl nitrogen (TKN) represents the sum of
In water and wastewater analysis, Kjeldahl nitrogen (TKN) represents the sum of
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Remember:
\[
\boxed{
\text{TKN}
=
\text{Organic N}
+
\text{NH}_3\text{-N}
}
\]
Nitrate and nitrite are not included.
Updated On: Jul 23, 2026
- Organic nitrogen + nitrate nitrogen
- Organic nitrogen + nitrite nitrogen
- Organic nitrogen + ammonia nitrogen
- Ammonia nitrogen + nitrate nitrogen
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Total Kjeldahl Nitrogen (TKN) measures the nitrogen present as
\[
\boxed{
\text{Organic Nitrogen}
+
\text{Ammonia Nitrogen}
}
\]
It does not include nitrate or nitrite nitrogen.
Hence,
\[
\boxed{\text{Organic nitrogen + ammonia nitrogen}}
\]
is the correct answer.
Therefore,
\[
\boxed{(C)}
\]
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