Am.  Jour.  Pharm.  \ 
December,  1898.  J 
Cane  Sugar  in  Official  Syrups. 
587 
He  also  finds  grape  sugar  to  deposit  from  such  syrups  on  stand- 
ing and  attributes  it  to  the  minor  solubility  of  glucose  in  water. 
Another  result  of  cane  sugar  inversion  in  acid  syrups  is  the  di- 
minished degree  of  sweetness. 
In  preparations  containing  no  bitter  principles  this  is  readily  no- 
ticeable and  may  be  found  in  syrups  of  hydriodic  acid  and  of 
Churchill's  hypophosphites. 
After  examination  of  the  official  syrups  containing  free  mineral 
acids,  those  with  organic  acids  were  likewise  subjected  to  investiga- 
tion and  also  gave  indication  of  the  inversion  of  the  cane  sugar 
although  not  in  as  pronounced  a  degree. 
In  both  cases  it  was  found  that  inversion  is  progressive  and  that 
at  short  intervals  the  respective  examinations  revealed  a  relatively 
greater  amount  of  inverted  sugar  from  the  percentage  previously 
found. 
It  was  also  observed  that  inversion  progresses  more  rapidly  in 
summer  than  winter. 
The  researches  undertaken  may  be  considered  under  the  follow- 
ing heads : 
(1)  Syrups  with  free  mineral  acids. 
(2)  Syrups  with  free  organic  acids. 
(3)  Syrups  without  free  acids. 
SYRUPS  WITH  FREE  MINERAL  ACIDS. 
These  are  syrups  of  hydriodic  acid,  calcium  lactophosphate, 
phosphates  of  iron,  quinine  and  strychnine,  and  hypophosphites. 
SYRUP  OF  HYDRIODIC  ACID. 
This  preparation  may  be  found  in  time  to  possess  all  the  pecu- 
liarities resulting  from  cane  sugar  inversion  from  the  assumption  of 
a  straw  color  to  a  grape  sugar  deposit.  The  peculiar  odor  some- 
times noticeable  may,  on  the  one  hand,  be  due  to  the  decomposition 
of  the  hypophosphorous  acid  present,  but  results  in  the  majority  of 
cases  from  the  evolution  of  hydrogen  sulphide  from  blued  sugar. 
The  progressive  inversion  of  cane  sugar  in  this  preparation  was 
repeatedly  studied,  and  the  following  examples,  one  carried  out  dur- 
ing winter,  the  other  in  summer,  are  hereby  submitted. 
Syrup  of  hydriodic  acid  was  prepared  in  March  of  the  present 
year  by  the  official  process  from  simple  syrup  prepared  by  cold  per- 
