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.
LC-MS chromatograms of methylphenidate using the 234.1488 m/z precursor ion (panel A) and the internal standard D9-clenbuterol using the 286.1400 m/z precursor ion (panel B). PRM spectra for methylphenidate (panel C) and D9-clenbuterol (panel D) following HCD fragmentation using a stepped collision energy of 30 and 80 eV in a standard.
