TABLE 2. Focus of GC/MS analyses. 



Saturated hydrocarbons 



Pentacyclic triterpanes (hopanes) 



Aromatic hydrocarbons 



Alkylated benzenes (C 4 , C 5 , Cg) 



Naphthalene and alkylated naphthalenes (C lf C 2 , C3, C4) 



Fluorene and alkylated fluorenes (C lf C 2 / C3) 



Phenanthrenes and alkylated phenanthrenes (C^, Co/ C3, C4) 



Fluoranthene 



Pyrene 



Benzanthracene 



Chrysene 



Benzo fluor an thenes 



Benzo (a) pyrene 



Benzo (e) pyrene 



Perylene 



Aromatic heterocyclics 



Dibenzothiophene and alkyl dibenzothiophenes (C^, C 2 » C3) 



TABLE 3. GC and GC/MS conditions. 



GC 



GC/MS/COMPUTER 



HP 598 5 

 SE-52 



Fused silica 



(JiW Scientific) 

 0.25 id 

 30 m 

 Helium 9 1 ml/min 



40-290 @ 3*/min 



250* C 



300 (ion source) 



70ev 



2200 volts 



Scan conditions 



40-500 amu 3 225 amu/sec 

 (1 scan/2 seconds 

 minimum of 5 spectra 

 per peak) 



40 



