Titrate the distillate with N/10 alkali, using phenolphthalein as an indicator.
Tetanotoxine may be distilled, and be found in the distillate with other matters.
The distillate is spirits of turpentine, the residue is rosin.
The former are detected by examining the distillate as previously directed.
The first portion of the distillate will, therefore, be of this strength.