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.
Graph bars showing the effect of pH on the % recoveries of the selected pharmaceuticals at (A) pH 3 using Oasis HLB, ENVI-C18 and Oasis MAX cartridges. (B) pH 7 using Oasis HLB, ENVI-C18 and Oasis MAX cartridges (C) comparison of the recoveries at pH 3 and 7 using HLB oasis cartridge using Oasis HLB, ENVI-C18 and Oasis MAX at two pH values (n = 3).
