Figure 3.
Average recoveries of 30 target analytes in water samples on SPE columns with different eluents: red columns for MeOH, green columns for 0.1% FA-MeOH, and blue columns for 5 mmol/L NH4AC-MeOH (Mean ± STD, n = 3).
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.