Waters Sorbent Selection Guide for Solid-Phase Extraction lists sorbent name, chemistry, description of how the surface interacts chemically, typical applications and some of the sorbent’s properties. The guide includes: Sep-Pak, Oasis and sorbent chemistries targeted for specific application. It is intended to be used as a quick reference guide showing the range of 25 chemistries Waters offers for SPE. The guide can be stored folded, reviewed by separation mode - several sorbents at a time, or posted on a wall displaying all separation modes and chemistries. This guide is a great reference tool for any scientist using SPE as a laboratory technique.