NMR fingerprinting (IMAGE) University of Texas at Austin Caption An illustration of the chemical fingerprinting process at work on a common pesticide. Each peak in the graph indicates a different combination of carbon isotopes bonded to fluorine, as measured by the NMR instrument. The pattern gives the molecule its fingerprint. Credit Cornelia Rasmussen/Jackson School of Geosciences/University of Texas Institute for Geophysics. Usage Restrictions Include photo credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.