Published Online: 1 January 1983
Page Count: 14
Forensic scientist, Criminalistics Laboratory, Suffolk County Medical Examiner's Office, Hauppaugue, NY
Associate professor of chemistry, C. W. Post College, Greenvale, NY
Deteetive criminalist, Scientific Investigation Bureau, Nassau County Police Department, Mineola, NY
(Received 19 April 1982; accepted 25 May 1982)
Automobile lubricants are frequently encountered at the scene of a crime and are submitted along with standards from the defendant's vehicle in order to establish common origin. The measurement of the total visible fluorescence by emission, synchronous excitation emission, and variable separation synchronous excitation (VSSE) spectra has been shown to individualize motor oils to a high degree. Spectra obtained from specimens at liquid nitrogen temperature increased the discrimination value of these techniques. The data obtained on 61 automobile lubricants is presented and conclusions discussed with particular emphasis on the recently developed VSSE technique.
Paper ID: JFS12251J