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.
Reversed-phase high-performance liquid chromatography (RP-HPLC) chromatogram of a mixture of dextromethorphan (DXM), its impurities, and excipients. Acquity BEH C18 column (50 × 2.1 mm i.d, 1.7 µm). Gradient elution of ethanol (slope of 3.1%/min) with 10 mM ammonium formate adjusted at pH 4.7 with formic acid. Flow rate: 0.23 mL/min. Temperature: 38.0 °C. Detection at 280 nm. Similar to Reference [44].
