(1)
Solve first for the amount of peppermint oil needed:
IF
THEN
100 ml Peppermint oil =
X ml peppermint oil
1000 ml spirit
240 ml spirit
(2)
Cross multiply: (1000) X = 100 (240)
1000 X = 24000
X = 24 ml of peppermint oil
(3)
To solve for the amount of peppermint powder needed:
IF
THEN
10 g peppermint powder
= _X g peppermint powder
1000 ml of spirit
240 ml of spirit
(4)
Cross multiply: (1000)X
= 10 (240)
1000 X
= 2400
X
= 2.4 g of Peppermint powder
c. Knowing that qsad means to "add a sufficient quantity up to," take 2.4 g of
peppermint powder, add 24 ml of peppermint oil, and add as much alcohol as is
necessary to make 240 milliliters. The final product will be Peppermint Spirit.
1-44. CONVERSION FACTOR METHOD
The conversion factor method is the easiest and therefore the most widely used
method for reducing or enlarging formulas.
a.
Find the conversion factor:
Total quantity desired_
= Conversion Factor
Total quantity of official formula
NOTE: The "Total Quantity Desired" and the "Total Quantity of Official Formula" must
have the same units so the units will cancel and yield a conversion factor without units.
MD0802
1-67
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