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.
Combined extracted-ion chromatograms for five 4-APEBA-derivatized urine samples spiked with 20 nM of hexanal, heptanal, octanal, nonanal, and decanal. Individual peaks are labeled with the peak area. For the separation, the short gradient described in experimental was used
