Am  Jour.  Pharm.1 
Feb.,  1884.  j* 
Tincture  Deposits. 
103 
Fehling's  solution,  but  gave  scarcely  any  evidence  of  sugar,  probably 
not  more  than  due  to  adherent  tincture.  The  deposit  in  tr.  card.  co.  is 
therefore  almost  entirely  tartrate  of  calcium. 
Tinctura  Chloroformi  Composita,  B.P.  ^- As  might  be  expected,  this 
deposit  is  the  same  as  that  occurring  in  tinct.  cardam.  comp. 
Tinctura  Oinchonce  Composita,  B.P. — This  deposit  was  of  a  dark 
reddish  brown  color,  and  in  a  state  of  very  fine  division,  not  at  all 
aggregated  into  lumps  or  scales.  1*769  gram  was  treated  as  described 
further  on  under  tinct.  cinchonas  flav.,  and  yielded  '0542  of  a  gram  or 
3*064  per  cent,  of  total  alkaloids.  The  acid  solution  of  alkaloids  was 
scarcely  fluorescent,  and  gave  only  a  faint  green  coloration  with  bromine 
and  amnionic  hydrate,  indicating  only  traces  of  quinia  or  quinidia.  A 
saturated  solution  of  the  sulphate,  when  shaken  with  half  its  volume 
of  ether  and  excess  of  ammonia,  afforded  abundant  evidence  of  the 
presence  of  cinchonia. 
The  coloring  matter  of  cochineal  was  also  present,  as  shown  by  the 
color  imparted  to  dilute  HC1  on  boiling  with  the  deposit,  and  by  the 
addition  of  sulphate  of  zinc  and  ammonic  hydrate  in  excess,  when  a 
fine  violet  tint  was  developed ;  ammonic  hydrate  alone  giving  a  deep 
claret  coloration. 
The  presence  of  cochineal  entirely  masked  any  reactions  for  cinchona- 
red  which  may  have  occurred. 
Ferric  chloride  gave  a  faint  reaction  for  cinchotannic  acid. 
The  deposit  was  found  to  contain  3*064  per  cent,  of  alkaloids,  chiefly 
cinchonia,  probably  existing  as  cinchotannates  ;  and  a  little  coloring 
matter  from  the  cochineal. 
Tinctura  Cinchonas  Flavaz,  B.P. — Three  samples  of  this  deposit  were 
examined,  they  varied  much  in  appearance  and  nature. 
First  sample. — This  was  of  a  brown  color.  Being  in  small  quantity 
only  it  was  simply  tested  for  the  presence  quinia  and  other  alkaloids. 
It  was  well  washed  with  proof  spirit,  to  free  it  from  adherent  tincture, 
dried  and  mixed  with  milk  of  lime,  thoroughly  dried  over  a  water- 
bath  and  extracted  with  chloroform.  The  chloroformic  solution  was 
shaken  with  dilute  sulphuric  acid  (to  dissolve  out  alkaloids  as  sulphates) 
and  washed  with  water  till  free  from  bitterness.  The  acid  solution  of 
alkaloids  thus  obtained  was  shaken  with  chloroform  and  ammonia  in 
slight  excess,  and  the  chloroformic  solution  separated  and  evaporated 
to  dryness. 
The  residue  which  consisted  of  the  pure  alkaloids  was  now  tested 
