Comparative Studies of the Methods of Determining Blood Alcohol with Reference to a Modification of Nicloux's Method

Abstract

1. The method of Benedict and Norris is not fitted for determining alcohol in a solution weaker than 0.01%. Though it has the advantage that its end point can be established very conveniently and definitely, the results obtained by this method are not in any degree better than those obtained by the aid of Nicloux's or Cotte's method, because its technique is too complicated and the reagents change their value quickly.
2. Cotte's method can be reliably employed even to very dilute solutions of alcohol, provided only that the proportion between the volume of alcohol solution and that of the bichromate solution is properly chosen (4:1).
3. Nicloux's method, modified in its technique, gives quite satisfactory results.