562  Laboratory  Notes.  {AmbJe~-,f7?.a,m 
The  dry  powder  is  moistened  with  ammonia  and  shaken  with  several 
portions  benzole. 
Residue,  containing  mor- 
phia,  indeterminate  and 
inorganic  matter,  etc. 
Agitate  with  several 
portions  amylic  alcohol  ; 
separate,  evaporate  the 
amylic  alcoholic  solution 
to  dryness,  and  weigh  as 
■crude  morphia.  Dissolve 
in  acidulated  water,  filter 
and  titrate  with  Mayer's  j 
solution. 
Solution,  containing    emetia,  narcotina  and  perhaps 
some  indeterminate  matter. 
Concentrate,  agitate  with  acidulated  water  5  separate 
the  water  solution  from  the  benzole  by  decantation  or 
filtering  through  a  wet  filter  (the  benzole  will  remain  in 
the  filter),  concentrate,  make  slightly  alkaline  (ammonia) 
and  shake  with  several  portions  of  petroleum  naphtha. 
Alkaline  Solution. 
Narcotina. 
Make  slightly  acid  and 
titrate  with  Mayer's  solu- 
tion. 
Petrol.  Naph.  Solution. 
Emetia. 
Agitate  with  acidulated 
water  ;  separate,  and  titrate 
its  acidulated  water  solution 
with  Mayer's  solution. 
In  each  case  three  grams  were  taken.  They  were  all  examined  for 
adulterations  and  found  to  be  pure.  The  following  are  the  results  of 
Mr.  C.  W.  Heister's  analysis  : 
Crude 
Morphia. 
Mophia 
determined 
volumetrically. 
Per  cent. 
Morphia 
(volumetric). 
Narcotina. 
Per  cent. 
Narcotina. 
Emetia. 
Per  cent. 
Emetia. 
I 
I    (  -04.00 
•0282 
'94 
•OI07 
•35 
•0060 
•20 
*  !  '0535 
•0303 
TOO 
'OI29 
•43 
•O057 
•19 
3  j  -0300 
•0242 
•80 
•0086 
•28 
•OO95 
•31 
4  |  '0455 
0282 
•94 
•0143 
•47 
•0081 
27 
5  0-535 
•0262 
•87 
•0107 
•35 
•OO76 
■*.s 
6  -0620 
•0303 
TOO 
•0107 
"35 
'0085 
•28 
j 
7  1  -0510 
■0282 
•94 
•0096 
•32 
•OO57 
•19 
Average  pr.  ct. 
1  '9* 
•38 
•24 
U.S. P.  standard 
I'OO 
1 
This  represents  2-4  per  cent,  emetia  in  the  powdered  ipecacuanha  root. 
