Describing the Basics and Principles of HPLC
Here is a very good, concise article from Knauer that covers the basics of HPLC (high pressure liquid chromatography). It starts with comparing isocratic versus gradient systems, and goes on to cover columns and detectors.
It is ideal for students who are about to start out in the field of HPLC.
CLICK HERE for a full copy of the document (650 KB pdf)