^ptemb^w™'}     Alcohol  in  Titration  of  Alkaloids. 
477 
MORPHINE. 
Indicator. 
Per  Cent. 
Per  Cent. 
98-58 
96-05 
98-48 
95-26 
98-32 
89-68 
9B-55 
105-44 
98-91 
97*56 
9841 
94 '05 
Water  Solution. 
Diluted  Alcohol 
Solution. 
In  the  case  of  tropaeolin  the  diluted  alcohol  solution  required  the 
addition  of  1-53  c.c.  H2S04  before  a  decidedly  acid  color  was 
obtained  and  satisfactory  titration  made  possible. 
After  addition  of  5  c.c.  of  alcohol  to  10  c.c.  of  the  diluted  alcohol 
solution,  the  following  results  were  obtained : 
Per  Cent. 
With  haematoxylin  89-00 
With  tropaeolin  OO,  requiring  the  addition  of  3-4  c.c.      H2S04,  107-68 
COCAINE. 
Indicator. 
Haematoxylin 
Cochineal  .  . 
Brazil  wood  . 
Tropaeolin  OO 
Lacmoid  .  . 
Litmus    .  .  . 
Water  Solution. 
Per  Cent. 
Per  Cent. 
97-26 
94-65 
96-35 
95-02 
95*95 
9071 
97-26 
104-23 
97 '44 
96-53 
96-35 
92-83 
Diluted  Alcohol 
Solution. 
In  the  case  of  tropaeolin  the  diluted  alcohol  solution  required  the 
addition  of  1-56  c.c.  T^  H2S04  before  a  decidedly  acid  color  was 
obtained  and  satisfactory  titration  made  possible. 
