Semipermeable membrane devices accumulate conserved ratios of sterane and hopane petroleum biomarkers.
D000413:Alaska; D015415:Biomarkers / Q000032:analysis; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D008567:Membranes, Artificial; D010539:Permeability; D010578:Petroleum / Q000032:analysis*; D012016:Reference Values; D013261:Sterols / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D015415:Biomarkers; D008567:Membranes, Artificial; D010578:Petroleum; D013261:Sterols; D014315:Triterpenes; D014874:Water Pollutants, Chemical; C025206:hopane