Cov luam yeeb muaj ntau yam alkaloids. Ntxiv nrog rau cov khoom tseem ceeb nicotine (muaj 2% mus rau 8%), nws kuj muaj demethylnicotine (nornicotine), pseudoequisetine (neonicotine) thiab tsawg kawg xya A kab ntawm alkaloids. Nicotine yog ib lub hauv paus nitrogenous uas muaj ob hom heterocyclic, pyridine thiab pyrrole. Cov khoom ntshiab yog cov kua tsis muaj xim oily nrog rau qhov kub ntawm 246 degree. Nws muaj kev sib hloov kho qhov muag (sab laug-tes tig) thiab soluble hauv dej thiab ntau cov kuab tshuaj organic. cov
Nicotine feem ntau muaj nyob rau hauv cov nroj tsuag li ntsev nrog cov organic acids xws li citric acid thiab malic acid. Thaum lub sij hawm rho tawm, luam yeeb feem ntau tuaj yeem ua kom sov nrog cov tshuaj inorganic muaj zog acid thiab tom qab ntawd neutralized nrog alkali kom dawb nicotine. Tom qab ntawd nws tau muab rho tawm nrog cov kuab tshuaj organic, thiab cov kuab tshuaj yog evaporated kom tau txais nicotine. Vim nws volatility, nws tuaj yeem muab rho tawm los ntawm chav distillation. cov
Tsis tas li ntawd, vim hais tias nicotine yog cov kua, nws yog ib qho nyuaj rau cais thiab purify. Yog li ntawd, nicotine feem ntau tshwm sim nrog picric acid los tsim nicotine dipicric acid ntsev crystals kom yooj yim tuav.