GC/MS analyses of fractionated extraction of Yima coal with CS2, petroleum ether, benzene

Yima coal was extracted with CS₂, petroleum ether and benzene sequentially. The extracts were analyzed with GC/MS. It is presented that there are many biological markers in Yima coal, and the docyclic terpenoids have the most content in the extracts. Main components in CS₂ soluble fraction from Yima coal are Aromatic terpenoids. Petroleum ether soluble fraction primarily consist of multi-carbon number n-alkanes. A series of diterpane evolution products with dehydroabietane skeleton and many oxygen-containing compounds were detected in benzene extract. The molecular structures detection of 1-bromotetracosane firstly provide information for existence form of halogeno-compounds in coal.