564  On  Some  of  the  Tests  for  Quinine.  {AS^££SST- 
B.    I-I000th  solution  of  quinine. 
1.  5  c.c.  of  the  solution  (=  5  mgms.  quinine)  yields  with: 
(a)  One  drop  chlorine  water  and  a  drop  of  ammonia : 
a  white  precipitate  (quinine)  which  quickly  assumes  a 
greenish  hue,  slowly  changing  to  well-marked  bluish  green. 
(fr)  o-i  c.c.  chlorine  water  and  one  drop  of  ammonia  :  the 
precipitate  quickly  acquires  a  strong,  bluish-green  color. 
(c)  05  c.c.  chlorine  water  and  a  drop  of  ammonia:  an 
intense,  emerald-green  coloration. 
(d)  10  c.c.  chlorine  water  and  one  drop  of  ammonia,  no 
precipitate,  but  a  strong  yellow  coloration,  which  soon 
changes  to  deep  purple. 
(e)  20  c.c.  chlorine  water  and  a  drop  of  ammonia,  a 
colorless  mixture  ;  on  further  addition  of  ammonia,  a  dirty- 
brown  coloration  may  be  produced. 
2.  1  c.c.  of  a  i-ioooth  quinine  solution,  yields  with  one  drop  of 
ammonia,  after  addition  of : 
(a)  One  drop  chlorine  water  :  a  green  turbid  mixture. 
(6)  o-i  c  c.  chlorine  water:  a  bright  green  coloration. 
(c)  0  5  c.c.  of  the  chlorine  reagent  :  a  pale  green  color- 
ation. 
(d)  1  o  c.c.  chlorine  water :  a  slightly  yellow  mixture. 
3.  o-i  c.c.  of  a  i-ioooth  solution,  under  like  conditions,  yields 
with  : 
(a)  One  drop  chlorine  water  :  a  very  bright  green  color- 
ation. 
(b)  Two  drops  of  the  chlorine  reagent  :  a  less  intense 
green  coloration. 
C.    i-5000th  solution  of  quinine. 
1.  5  c  c.  of  the  solution  =  (1  mg.  quinine)  yields  with  a  drop  of 
ammonia,  after  addition  of: 
(a)  One  drop  chlorine  water  :  a  colorless  solution,  which, 
after  a  time,  may  acquire  a  greenish  hue. 
{b)  02  c.c.  chlorine  water  :  a  fine,  emerald  green  solu- 
tion. 
(c)  o  5  c.c  chlorine  water  :  a  well-marked  green  color- 
ation, quickly  discharged  on  shaking  the  mixture. 
