I am inclined to agree that prime does not affect nitrite readings.
In fact upon further studies I am not able to find anything from Seachem Prime about detoxifying nitrite at all to be perfectly honest.
I assumed, wrongly, that prime would detoxify nitrite but this does not seem to be the case.
The only thing that I can find that affects nitrite is aquarium salt.
But to answer your question, no I do not think Seachem prime will have any affect in nitrite tests or readings.
In fact upon further studies I am not able to find anything from Seachem Prime about detoxifying nitrite at all to be perfectly honest.
I assumed, wrongly, that prime would detoxify nitrite but this does not seem to be the case.
The only thing that I can find that affects nitrite is aquarium salt.
But to answer your question, no I do not think Seachem prime will have any affect in nitrite tests or readings.