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.
Chromatograms of mixture of standard phenolic compounds (retention times - gallic acid 2.39; protocatechuic acid 3.75; p-aminobenzoic acid 4.03; chlorogenic acid 5.47; catechin 5.87; caffeic acid 7.32; epicatechin 8.12; vanillin 9.55; p-coumaric acid 9.91; rutin 10.40; ferulic acid 10.82; quercitrin 11.74; resveratrol 12.91; quercetin 13.33).
