??

,??,??????????,16??,?.
?????
?????????
?????????????6???12????????????????????

????
?
? ? ??

??
??? ??

????????
????


??
??????????
??

?


????????.....

??

???
????
???????

? ?

???????????????????????????

??
???????????????????????
???????????????????????B?v????????????????????????????????????????????????????????????????????????????

??
??????????????????????
1.????????????
2.???????h??????
3.??????????????????????????????????????????
4.??????????????????????
5.?...

? (nicotine)?? (nicotiana alkaloids)12???????1928????t???^
???????c?40mg
????????????????247/745mmHg???? ???60?????????????????????
??????2%~3%???5% NaOH??????????2g????????????????????????
??
???????????
??2g5% NaOH?20mL15mL????
1??25mL?2g?2mL 5% NaOH?10min??????1????????4mL...

??
?????????????????????????????????????????????????????????????????????????????????