https://www.sciencedaily.com/releases/2020/05/200512151943.htm

"During an arson investigation, a dog may be used to identify debris that contains traces of ignitable liquids -- which could support a hypothesis that a fire was the result of arson," explained Robin Abel, graduate student in the Department of Chemistry and lead author of the study. "Of course, a dog cannot give testimony in court, so debris from where the dog indicated must be taken back to the laboratory and analyzed. This estimate provides a target for forensic labs when processing evidence flagged by detection dogs at sites of potential arson."

The study involved two dog-and-handler teams. The first was trained to detect a variety of ignitable liquids, while the other was trained primarily with gasoline. Results show that the dog trained on a variety of liquids performed well detecting all accelerants, while the dog trained on gasoline was not able to generalize to other accelerants at extremely low concentrations.