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in nitrate reduction test. why is it that some website says that nitrate reduce to nitrite...

in nitrate reduction test. why is it that some website says that nitrate reduce to nitrite then reduce to either ammonia or nitrogen. but in the charts only nitrate to nitrite to nitrous oxide to nitrogen there is no ammonia?

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All the websites say that nitrate is reduced first to nitrite and then reduced to either ammonia or nitrogen gas.

The important part in a nitrate reduction test is the reduction of nitrate to nitrite and its identification. The metabolites produced after the formation of nitrite could be ammonia, nitric oxide, nitrous oxide or nitrogen.

The reason to exclude ammonia in the chart may be due to its unimportance.

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