An official website of the United States government
Here's how you know
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.
Averaged nESI-MS spectra in negative ion mode. A. 0 hpf (n=16 samples). B. 24 hpf (n=13 samples). C. 48 hpf (n=16 samples). D. 72 hpf, controls (n=10 samples). E. 72 hpf, exposed to TCE (n=15 samples). F. 96 hpf (n=11 samples).