Geochimica

  Description Method Sample Time
      Size  
        (days)
  Hydrogen (D/H) Isotope Analyses      
   2H of kerogen – duplicate EA-IRMS 0.1 g 28
   2H of whole oil or oil fraction – duplicate EA-IRMS 0.1 g 28
   2H of water or brine – triplicate equilibration 5 mL 14
   2H and 18O of water or brine – triplicate equilibration 5 mL 14
   2H of core water (deuterium labelled) – duplicate equilibration 1 mL 14
         
  Carbon Isotope Analyses      
   13C of kerogen – duplicate EA-IRMS 0.1 g 21
   13C of whole oil or oil fraction – duplicate EA-IRMS 0.1 g 21
   13C and 18O of carbonate by acid digestion – duplicate CF-IRMS 0.2 g 21
   Sampling of carbonate from mineral — Enquire 21
         
  Oxygen Isotope Analyses      
   18O of water or brine – triplicate equilibration 5 mL 14
   18O and 2H of water or brine – triplicate equilibration 5 mL 14
   18O and 13C of carbonate by acid digestion – duplicate CF-IRMS 0.2 g 21
   Sampling of carbonate from mineral — Enquire 21
         
  Sulfur Isotope Analyses      
   34S of whole oil or oil fraction – duplicate EA-IRMS 0.1 g 21
   34S of sulfate, sulfide or sulfur bearing mineral – duplicate EA-IRMS 0.1 g 21
   34S of sulfate in water sample – duplicate EA-IRMS 200 mL 21
   Purification of sulfide sample — Enquire 21

Le quantità del campione fornite sono solo a scopo indicativo. L’analisi mediante EA-IRMS necessita normalmente  di 1 – 5 mg di quantità di campione. I tempi di consegna dei campioni indicati sono tipici per l’analisi di 40 campioni