title: Mass fragmentographic determination of polymethylnaphthalene and polymethylphenanthrene in a crude oil and in marine organisms.
mesh_terms: D002606:Charcoal; D002845:Chromatography; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D009281:Naphthalenes / Q000032:analysis*; D010125:Ostreidae / Q000032:analysis*; D010578:Petroleum / Q000032:analysis*; D010616:Phenanthrenes / Q000032:analysis*; D011108:Polymers / Q000032:analysis*
chemical_list: D009281:Naphthalenes; D010578:Petroleum; D010616:Phenanthrenes; D011108:Polymers; D002606:Charcoal; C027389:polymethylphenanthrene; C027388:polymethylnaphthalene