290 
Extract  of  Malt. 
r  Am.  Jour.  Pharm. 
\      June,  1883. 
nearly  live  times  as  great  as  that  of  the  former,  and  the  diastastic  action 
of  the  malt  can  stand  about  four  times  more  acid  than  that  of  the 
saliva  without  being  interfered  with. 
V.  Nitrogenized  constituents  (albuminates)  should  be  present  in  an 
easilv  digestible  form. 
These  are  the  principal  condition'^  in  the  analysis  of  an  extract  of 
malt. 
Many  put  a  great  value  on  the  soluble  phosphates  in  the  examination 
of  the  ash,  but  it  cannot  be  accepted  as  a  criterion  of  a  good  extract. 
The  percentage  of  the  phosphates  will  vary  according  as  hard  or  soft 
water  is  used,  and  furthermore,  these  substances  can  be  added  to  the 
most  worthless  preparation.  The  examination  of  the  ash  will  not  be 
described  here,  as  directions  can  be  found  in  every  analytical  work. 
The  estimation  of  the  percentage  of  dextrin  and  maltose  is  also  of 
no  consequence,  as  a  preparation  which  has  the  properties  noted  above, 
will  have  the  proper  amount  of  dextrin  and  sugar. 
Estimation  of  solid  matters  and  water. — 20  grams  of  extract  are  dis- 
solved in  enough  distilled  water  to  make  the  solution  weigh  200  grams. 
With  this  solution  I  determine  the  percentage  of  extract  by  means  of 
a  Czeczetka's  maltometer,  which  shows  the  percentage  of  extract 
dried  at  110°C.  Those  not  in  possession  of  one  or  of  a  similar  instru- 
ment  should  estimate  the  specific  gravity  of  the  liquid  at  17.5°C.,  and 
compare  the  same  with  a  table  by  Griesmayer,  published  in  Fresenius' 
Analytische  Zeitschrift,''  1880,  page  104,  in  order  to  determine  the 
amount  of  extract.    Another  method  is  the  following : 
Specific 
Gravi  t  y. 
Specific 
Gravity. 
Extract 
dried  at 
100°C. 
Specific 
Gravity. 
Extract 
dried  at 
100°C. 
Specific 
Gravity. 
^  ^  0 
Specific 
Gravity. 
. 
Extract 
dried  at 
lOQoC. 
1-1032... 
50  per  ct. 
1-1202... 
58  per  ct. 
1-1401... 
66  per  ct. 
1-15!)4... 
74  per  ct. 
1-1818... 
83  per  ct 
1-1053... 
51 
1-1235... 
59     "  _ 
1-1425... 
67  " 
1-1618... 
75 
1-1844... 
84  " 
1-1075.. . 
52 
1-1258... 
60  " 
1-1449... 
68  " 
1-1G68... 
77     ' ' 
1-1870... 
85     "  . 
53 
! 
1-1281... 
61  " 
1-1473... 
69  " 
1-1691... 
78  " 
1-1897... 
86  " 
1-1117... 
5. 
1-1305... 
62     "  i 
1.1497... 
70  " 
1-1718... 
79  " 
1-1925... 
87  " 
1-1138... 
55 
1-1329... 
03  " 
1-1521... 
71  " 
1-17J1... 
80  " 
1  -1952... 
88  " 
1-1159... 
50 
1-1353.. 
64     "  i 
l-154p... 
72  " 
1-1767... 
81  " 
1-1979... 
89  " 
1-1180... 
57 
1-1.377... 
1-1569... 
i 
73     ' ' 
1-1792... 
82  " 
1-2007... 
90  " 
