The glycerine may also be determined by the acetin or bichromate methods after driving off the alcohol and ether if so desired. |
Determine the apparent percentage of glycerol in the sample by the acetin process as described. |
Determine the acetin value of the residue at in terms of glycerol. |
An approximation to the quantity can be obtained from the spread between the acetin and bichromate results on such distillates. |