Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Temporal plot of GC total ion chromatograms of the mass collected on o-PDA-doped SPME fibers from panel 2 (see Experimental Design) during IMPACTS (a). Annotated EI-MS spectrum of toluene (RT 2.1 min) observed on 07/17/2014 (b). All retention times were confirmed with authentic standards.
