6o  Exmnination  of  Citrates,  etc.  {^"^y^Z'^^I^"^ 
Elixir  Cinchona  Comp.  Ferratum. 
Ferri  pyrophosph.,  .....  gii,  grp.  viii 
Aquae  bull,,  ,  •  .  .  .  .  • 
Elix.  cinchonas  comp.,  ...... 
M. 
XV 
Elixir  Rubrufn. 
Elixir  simplex,      .......  Oi 
Tine,  cudbear  (i  to  8),  .  .  .  q.  s.  (about  ,!5i-3ii) 
M. 
Philadelphia,  First  month  i6,  1875. 
Note  by  the  Editor. — The  arguments  in  favor  of  the  formulas  for  elixirs,  as 
recommended  by  the  Pharmaceutical  Association,  are  : 
1.  That  the  names  indicate  the  true  composition  5  and, 
2.  That,  the  simple  elixir  being  kept  on  hand,  they  may  all  be  readily  prepared 
extemporaneously. 
EXAMINATION  OF  CITRATE  OF  MAGNESIUM  AND  EFFERVES- 
CENT CITRATES  AND  TARTRATES. 
BY  WILLIAM   SCHRAGE,  OF   SHEBOYGAN,  WIS. 
I .  ^lantitat'ive  deterinination  of  Citric  Jcid^  and  Tartaric  Acid^  atone 
or  in  pwesence  of  each  other,  or  of  Sulphuric  Acid,  or  Sugar. — It  may  be 
premised  that  the  determinations  of  magnesia,  potassa,  soda,  sulphuric 
acid  and  carbonic  anhydride — qualitative  and  quantitative — may  be 
readily  made  according  to  the  directions  of  ordinary  manuals  of  qual- 
itative and  quantitative  analysis.  For  the  bases,  the  water  solution  of 
the  material  is  slightly  acidulated  with  acetic  acid,  and  boiled  to  expel 
all  carbonic  acid.  For  the  flame  colors  of  the  alkalies  the  organic 
portion  must  first  be  burned  out.  Magnesium  is  precipitated  as  ammo- 
nio-phosphate  and  weighed  as  pyrophosphate.  Sodium,  in  absence  of 
potassium,  may  be  weighed  as  sulphate  ;  but  if  magnesium  is  present, 
it  must  first  be  removed  by  baryta  solution,  the  baryta  being  then  re- 
moved as  sulphate.  If  soda  and  potassa,  both  are  to  be  estimated, 
they  must  first  be  obtained  (and  weighed  together)  as  chlorides,  and  to 
this  end,  if  sulphates  are  present  (as  from  removal  of  magnesium),  the 
sulphuric  acid  must  first  be  all  removed  by  baryta  solution  and  the  ex- 
cess of  baryta  by  carbonic  anhydride.  From  the  potassic  and  sodic 
chlorides  the  potassic  chloride  is  then  taken  out  with  platinic  chloride 
and  alcohol.  For  the  qualitative  determination  of  citric  and  tartaric 
acids,  if  sulphates  are  present,  the  sulphuric  acid  should  first  be  removed. 
