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Questions and Answers
What is the chemical formula for Ammonium ion?
What is the chemical formula for Ammonium ion?
- $NO_3^-$
- $TAN$
- $NH_3$
- $NH_4^+$ (correct)
Which of the following represents Total Kjeldahl nitrogen?
Which of the following represents Total Kjeldahl nitrogen?
- $TKN - (NH_4^+)$
- $Organic ext{ N} + NH_3 + NH_4^+$ (correct)
- $TAN + NO_2^- + NO_3^-$
- $Organic ext{ N} + NO_2^- + NO_3^-$
Which of the following forms is not included in Total inorganic nitrogen (TIN)?
Which of the following forms is not included in Total inorganic nitrogen (TIN)?
- $Organic ext{ N}$ (correct)
- $NO_2^-$
- $NO_3^-$
- $NH_3$
What is the abbreviation for Total ammonia nitrogen?
What is the abbreviation for Total ammonia nitrogen?
What does Total nitrogen (TN) consist of?
What does Total nitrogen (TN) consist of?
What is the abbreviation for Total Kjeldahl Nitrogen?
What is the abbreviation for Total Kjeldahl Nitrogen?
Which of the following is included in Total Inorganic Nitrogen?
Which of the following is included in Total Inorganic Nitrogen?
What does Organic Nitrogen represent in the context provided?
What does Organic Nitrogen represent in the context provided?
Which form of nitrogen is represented by the abbreviation NO2-?
Which form of nitrogen is represented by the abbreviation NO2-?
What is included in Total Ammonia Nitrogen (TAN)?
What is included in Total Ammonia Nitrogen (TAN)?
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Study Notes
Forms of Nitrogen
- Ammonia Gas (NH3): A gaseous form of nitrogen.
- Ammonium Ion (NH4+): A positively charged ion derived from ammonia.
- Total Ammonia Nitrogen (TAN): Sum of ammonia gas and ammonium ion (NH3 + NH4+).
Nitrogen Compounds
- Nitrite (NO2-): An inorganic form of nitrogen presented as a negatively charged ion.
- Nitrate (NO3-): Another inorganic nitrogen form, also negatively charged.
Inorganic and Organic Nitrogen
- Total Inorganic Nitrogen (TIN): Combines ammonia gas, ammonium ion, nitrite, and nitrate (NH3 + NH4+ + NO2- + NO3-).
- Total Kjeldahl Nitrogen (TKN): Measures organic nitrogen, ammonia gas, and ammonium ion (Organic N + NH3 + NH4+).
- Organic Nitrogen: Calculated by subtracting the sum of ammonia and ammonium from TKN (TKN - (NH3 + NH4+)).
Total Nitrogen
- Total Nitrogen (TN): The comprehensive measurement encompassing all nitrogen forms (Organic N + NH3 + NH4+ + NO2- + NO3-).
Testing Importance
- The TKN test is critical for determining total nitrogen levels in raw municipal sewage, focusing on non-oxidized nitrogen.
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