Ammonia Reference Ranges / Methods

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Last updated 5:29 AM on 4/28/26
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6 Terms

1
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Plasma Ammonia Concentrations

___

Adults

15 - 45µg/dL 

Neonates

40 - 90µg/dL 

Premature Infants

90 - 150µg/dL 

2
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15 - 45µg/dL 

Plasma Ammonia Concentrations

Adults

Neonates

40 - 90µg/dL 

Premature Infants

90 - 150µg/dL 

3
New cards

40 - 90µg/dL 

Plasma Ammonia Concentrations

Adults

15 - 45µg/dL 

Neonates

Premature Infants

90 - 150µg/dL 

4
New cards

90 - 150µg/dL 

Plasma Ammonia Concentrations

Adults

15 - 45µg/dL 

Neonates

40 - 90µg/dL 

Premature Infants

5
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Chemical Method - Haber-Bosch

  • Produced by the German chemist Fritz Haber in the 20th century to develop high-pressure devices and catalysts to carry out the process on a laboratory scale. 

  • The atmospheric nitrogen (N2) is converted to ammonia (NH3) by reacting it with hydrogen (H2)

<ul><li><p><span style="background-color: transparent;">Produced by the German chemist Fritz Haber in the 20th century to develop high-pressure devices and catalysts to carry out the process on a laboratory scale.&nbsp;</span></p></li><li><p><span style="background-color: transparent;">The atmospheric nitrogen (N2) is converted to ammonia (NH3) by reacting it with hydrogen (H2)</span></p></li></ul><p></p>
6
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Enzymatic Method - Glutamate dehydrogenase

  • Measures decrease in absorbance of NADPH or NADH at 340 nm as it is oxidized during the conversion of 2-oxoglutarate and ammonia into glutamic acid.

  • Used for diagnosing conditions like (Reye's syndrome or hepatic encephalopathy). 

<ul><li><p><span style="background-color: transparent;">Measures decrease in absorbance of NADPH or NADH at 340 nm as it is oxidized during the conversion of 2-oxoglutarate and ammonia into glutamic acid.</span></p></li><li><p><span style="background-color: transparent;">Used for diagnosing conditions like (Reye's syndrome or hepatic encephalopathy).&nbsp;</span></p></li></ul><p></p>