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.
Values obtained by ICP-MS/MS for As (black), Cd (red), Hg (blue), and Pb (green) in the 197 FF samples measured as part of the present study (filled in circles) compared to those measured in 60 of the FF samples that were originally measured by SF-ICP-MS (open circles). The geometric mean ± geometric standard deviation are shown for each group.
