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Quick Answer. A personâs normal ammonia level typically ranges between 15 to 45 micrograms per deciliter. To determine these levels, an ammonia blood test is performed.
As pH increases, NH 4+ is converted to NH 3, and the toxicity increases. Higher temperatures also favor the more toxic form. It is very important that you compare values of ammonia correctly. You must compare total ammonia to total ammonia, and compare un-ionized ammonia to un-ionized ammonia.