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.
(a) Photo and (b) schematic of an extraction spray ionization source for MS analysis. (c) MS/MS spectrum obtained by TSQ for 10 ng/mL amitriptyline in blood, dried sample prepared with 0.2 µL blood, 10 µL methanol for extraction and spray solvent. (d) Photos of paper substrates with dried blood samples before and after extraction spray process using different solvents
