Am.  Jour.  Pharm. 
February,  1899.  . 
Extractum  Ipecacuanha  Liquidum. 
73 
Average1  ~| 
pure  cider  ! 
vinegar,  22  | 
samples  *;  .  J 
—  4'46 
i"oi46 
1*015 
roi6 
4*o6 
3-97 
3'9S 
2-83 
i*95 
2"3 
2-4 
o-39 
0-26 
o'o87 
0-032 
ill 
a  o  o  . 
liil 
•■~±!-5l 
D  It 
d^-<  o 
9, 
So 
o.S 
o 
Ho 
a  a 
5< 
38-8 
30 
16 
19-1 
3 
trace 
28-6  — 
20  absent 
13  I  present 
5+  present 
1  Albert  K.  Smith. 
A  is  undoubtedly  cider  vinegar,  containing  added  water,  as  is 
shown  by  the  small  amount  of  soluble  phosphates  present. 
B  is  a  mixture  of  cider  and  spirit  vinegar,  the  amount  of  ash  and 
soluble  and  insoluble  phosphates  being  very  low,  the  alkalinity  of 
the  ash  also  being  deficient. 
C  is  spirit  vinegar  with  a  little  cider  vinegar  added,  probably  to 
give  it  flavor. 
THE  ASSAY  OF  EXTRACTUM  IPECACUANHA  LIQUI- 
DUM.1 
By  Harold  Wiwon. 
The  British  Pharmacopoeia  contains  a  liquid  extract  of  ipecacu- 
anha, which  is  standardized  to  contain  not  less  than  2  and  not  more 
than  2-25  grammes  of  alkaloid  in  100  c.c,  and  an  assay  process  is 
made  official,  of  which  the  following  is  an  outline  : 
Twenty  c.c.  of  the  strong  liquid  extract  are  diluted  with  an  equal 
volume  of  water  and  the  alcohol  removed  by  heating  on  a  water 
bath ;  excess  of  solution  of  subacetate  of  lead  is  then  added,  and 
the  liquid  filtered  off,  the  precipitate  being  washed  with  water  and 
the  washings  added  to  the  filtrate.  This  liquid  is  then  freed  from 
lead  by  precipitation  with  dilute  sulphuric  acid  and  subsequent 
filtration,  the  precipitate  being  washed  with  water,  and  the  wash- 
ings added  to  the  filtrate.    It  is  now  transferred  to  a  separator, 
1  Pharmaceutical  Journal,  July  2,  1898,  p.  3. 
