Abstract: In order to be sure of the specific chemical shift range for each hydrogen or carbon structural group,a database and managing system for NMR chemical shift of 725hydrocarbons published in Sadtler standard NMR spectra are established. With this database and managing system,statistical distribution charts of chemical shift for various hydrogen and carbon structural groups are given.NMR spectra of hydrocarbon,especially petroleum products can be analyzed with the above distribution charts.Thesystem can also be conveniently used to locate the standard spectrum.

Key words: Database, Statistical distribution chart, NMR, Hydrogen and Carbon group