Answers:
72 hours, according to everything I've see. That's indistinguishable as for when you quit smoking. Nicotine is nicotine, regardless of the transfer system. If you are quitting, I extend my heartiest congratulations. Good for you! :-)
Why do you ask? Don't speak about me the Insanity have gotten to the point where on earth they do "drug tests" fro nicotine?!?!!?!