Combining two techniques, analytical chemists at the Department of Energy's Oak Ridge National Laboratory have become the ...

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 ...

Because the mix of carbon isotopes bonding to each fluorine atom is unique to how ... on samples that included pharmaceuticals and a common pesticide. Rasmussen and Hoffman are now conducting ...