448 
British  Pharmaceutical  Conference.  {Am 
September,  1899. 
In  the  following  table  the  results  given  are  obtained  from  six  samples  of 
liquid  extract  by  the  foregoing  processes,  titrations  excepted,  and  by  the  pro- 
cesses respectively  of  Wilson  and  the  Pharmacopoeia  : 
TABLE  IV. — ASSAYS  OF  LIQUID  EXTRACT.1 
No.  of 
B.P.,  1S98, 
"Wilson's 
Lime 
Process 
Process 
Sample. 
Process. 
Process. 
Process. 
No.  3. 
No.  4. 
i  (a)  
1 '94 
2-25 

1*28 
(*)  
20 
2-13 
1-38 
2  (a)  
2 '94 
3-16 
2"2 
3-384 
(b)  
2 '995 
3'ii 
2*1 
3-296 
3  («)  
1*90 
2-053 
1-452 
2-268 
2-273 
(*)  
1-905 
2-014 
I-52I 
2-301 
2-289 
4  V)   •  —  b*H 
3-025 
3-275 
I-64 
3-584 
3-528 
w  
3-001 
3-112 
IH84 
3-406 
3-413 
5  (a)  .  -  :". f: 
1  '886 
2013 
I-382 
2-304 
2-289 
(b)  . 
1-950 
1-998 
I-525 
2-288 
2-249 
6  (a)   .  .     .  . 
1-996 
2-135 
I-463 
2-401 
2-368 
(*)  
1-935 
2*104 
I-6I2 
2-397 
2-349 
1  The  figures  refer  to  grammes  of  alkaloid  per  ico  c.c. 
For  the  assay  of  the  wine  the  following  adaptation  of  the  previous  process 
is  recommended.  One  hundred  c.c.  is  evaporated  over  the  water-bath  to  10  c.c. , 
a  little  kieselguhr  stirred  in,  the  mixture  transferred  to  a  beaker. and  the  basin 
washed  with  the  mixture  of  2  c.c.  of  dilute  sulphuric  acid  and  30  c.c.  of  water. 
The  solution  is  then  filtered  and  water  passed  through  the  filter  until  the  vol- 
ume measures  50  c.c.  Of  this  nitrate  25  c.c.  is  taken,  which  represents  50  c.c. 
of  the  wine,  and  the  remaining  operations  are  conducted  as  detailed  in  process 
No.  4. 
The  appended  table  shows  the  results  yielded  by  three  samples  of  wine  : 
TABLE  V  —  VINUM  IPECACUANHA,  B.P.,  1898,  ASSAYED  BY  PROCESS  4. 
Sample. 
unit  of 
Taken. 
Weight  of 
Alkaloid 
Obtained. 
C.c.  of 
N10 
HC1 
Alkaloid 
Amount 
by 
Titration. 
Amount 
of 
Impurity. 
Alkaloid  in 
Grammes  per 
ico  C.c.  of  Wine. 
IS 
Consumed. 
By 
Weighing 
By 
Titration. 
1  (a)  .... 
0-039 
1  "5 
0-03615  • 
0-00285 
0-078 
0-0723 
(*>. .... ..... 
aj  v 
0-037 
1  "4 
0-03374 
0-00326 
0-074 
0-06748 
2  (a)  .... 
81 
C044 
1-8 
0-04331 
0-00069 
0-088 
0-08662 
(b)  ■ 
3  (a)  .... 
(*)  .... 
The  repr 
of  50  c.c 
assay. 
0-040 
0-033 
0030 
1-65 
*'3 
1*2 
0-039765 
003133 
002892 
0-000235 
0-00167 
000108 
0*080 
0-066 
0-060 
0-07953 
0  06266 
0-05784 
