Nitrate Contamination

[Elementary]

What would happen if some sodium nitrate contaminated the sodium nitrite in the alkali metal nitrite/ethyl halide preparation of nitroethane ?

What extra things might be formed ?
Could they be easily removed ?
Would it mess up the whole reaction ?
One day I'll understand everything !

[Rhodium]

You could end up with explosive alkyl nitrates (nitroglycerin analogs) and nitrate should also be capable of oxidizing free halide ions to the corresponding halogen (bromine/iodine). I don't know if this would present a real-world problem, short of diminished yields, this is only what theoretically could form.