Since blood alcohol determinations are coming into prominent use in law enforcement, knowledge of the reliability of analyses on blood that has aged is important. Suitability of various preservatives is discussed in relation to data on maintenance of the alcohol content of blood specimens. The data is in such a form as to be a reference for the expected change in alcohol concentration in an aged blood sample. A method of analysis for alcohol is presented. Discrepancies in alcohol content by different types of analyses are found on aged specimens
