Scheme 1.
MDA derivatization process with DNPH yielding 1-(2,4-dinitrophenyl) pyrazole (MDA-DNPH). At lower pH MDA appears in equilibrium between its protonated enol (α-β-unsaturated carbonyl) aldehyde form and the dialdehyde form.
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.