My purpose here it's only do science......I recommend to use of nicotine extracted with this methods only for purely scientific utilization , it's not pure.
Nicotine is dangerous so you must use your mind, anyway a approximated dates about nicotine are:
DL50 (skin) is 0.5-1 mg/Kg and there is about 1-2 mg each cigarette.
The procedure I used is as follows:
install a normal distillation apparatus with a
heating mantle Claisen head + Leibig condenser+ glass stopper+ 200 ml round-bottom flask+50-100 ml round-bottom flask.
Recommend you use double gloves moreover if you're paranoid like me you can use electrical fan turned towards the distillaltion apparatus and you can use a antigas-mask (with filter: A2B2E2K2P3).
Prepare 3-4 g tobacco(7-8 cigarettes) and place it into a the round-bottom flask then pour 100 ml solution of 5% NaOH into the flask, start the heating mantle to the maximum, distil for about 40-60 minutes.
Treat the product with diethyl ether, 2-3 times.
Evaporate ether, of course you do not need to have a rotary evaporator, given what it costs, you can use a electrical fan turned in front of the beaker, you wait about 20 minutes, nicotine residue remains on the bottom.