Chemdex Chemdex TM Select here if you see no menu to the left . This page points to information about spectrometry, together with some pointers to key lists elsewhere which may well cover this area in more detail.
More advanced information is elsewhere on the site.
On Apollo 17, a mass spectrometer was deployed on the lunar surface for the same purpose. This site gives the experimental details. Includes a number of quizzes with which you can practice assignments of compound structures. Includes a number of practice files to help assignments of compound structures. Includes Flash animations.