Can you tell me the chemical test method for nicotine (nicotine) and the chemical instruments needed?

Nicotine test: nicotine, also known as nicotine, chemical formula for C10H14N2, it is a characteristic substance contained in tobacco, the greatest harm lies in its addictive properties. Long-term smokers are prone to chronic bronchitis, coronary heart disease, vascular sclerosis, indigestion, visual impairment and other diseases. Nicotine is soluble in alcohol and produces a white precipitate when it meets HgCl2 liquid. Replace the chicken blood in test tube C above with 10 ml of 95% alcohol. Light a cigarette and inhale from the earwash bulb so that the smoke passes through three specimen test tubes A, B and C. When the third cigarette was burned, the alcohol in tube C turned yellow. Continue to light the cigarette until the alcohol turns brown, remove tube C, pour 2 ml of the brown solution into another test tube, and then drop HgCl2 liquid, which immediately produces a white precipitate, proving that the cigarette contains nicotine. Apparatus: test tubes catheter