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.
MALDI mass spectrometric profiles obtained by SPE of control human serum with C18 micro tips at different dilution ratios. Healthy individual sera samples were diluted with a 0.5% TFA solution at different serum: TFA volume ratios (v/v), (A) 1:0.5, (B) 1:2, (C) 1:5, (D) 1:10, and (E) 1:20.
