AOAC Official Method 932.10 Oil in Cassia, Cinnamon, and Clove Extracts
First Action 1932
Final Action 1992
Pipet 10 mL test sample into Babcock milk test bottle. Remove nearly all alcohol by blowing air into bottle through small glass tube 30 min, or longer if necessary. From 10 mL buret add 1 mL solvent (equal parts USP mineral oil and H2O-free kerosene), shake well, and fill with saturated MgSO4 solution. Centrifuge 10 min and read volume of oil from extreme bottom to extreme top of column. To obtain % oil subtract 5 divisions and multiply remainder by 2.
References: JAOAC 15, 539(1932); 19, 407(1936).
