Below are links to online resources that can help students to understand how to measure concentration of substances with NMR. If you know websites that discuss this issue, please post links to them in this thread.
NMR job online resources
NMR Jobs
General
NMR900
NatureJobs.com
NMR Information Server
NMR Knowledge Base
ScienceCareers.org
ScienceJobs.com
Careerbuilder.com