btech knowledge? for that u will have experiments in first year chemistry cycle. i am doing 2nd semester now. basic knowledge comes only from NCERT kind of books.
oh..toh matlab for enginnering level u need something of high level? u said that u need basics..try taking ncert from ur books? lecturer ne seminar maanga hai kya? aise hi hota hai!
Refer NCERT class XI book..it contains helpful information. if not, refer these links
en.wikipedia.org/wiki/Chromatography
composite.about.com/library/glossary/a/bldef-a177.htm