Analisi isotopi dell’ossigeno 18O / 14O

  Description Method Sample Time
      Size  
        (days)
  Agricultural Services      
   18O of cellulose – duplicate EA-IRMS 0.1 g 28
   18O of cellulose – 20% in duplicate EA-IRMS 0.1 g 28
   18O of water – duplicate equilibration 5 mL 14
   18O and 2H of water – duplicate equilibration 5 mL 14
   Azeotropic distillation of water from plant or soil — Enquire 21
         
  Ecological Services      
   18O of animal tissue – duplicate EA-IRMS 0.1 g 28
   18O of animal tissue – 20% in duplicate EA-IRMS 0.1 g 28
   18O of nitrate – duplicate EA-IRMS Enquire 28
   18O of nitrate – 20% in duplicate EA-IRMS Enquire 28
   18O of water – duplicate equilibration 5 mL 14
   18O and 2H of water – duplicate equilibration 5 mL 14
   Azeotropic distillation of water from plant or soil — Enquire 21
         
  Forensic Services      
   18O of organic solid – priority – triplicate EA-IRMS Enquire 14
   18O of organic liquid – priority – triplicate EA-IRMS Enquire 14
         
  Geochemical Services      
   18O of water or brine – triplicate equilibration 5 mL 14
   18O and 2H of water or brine – triplicate equilibration 5 mL 14
   18O & 13C of carbonate by acid digestion – duplicate CF-IRMS 0.2 g 21
   Sampling of carbonate from mineral — Enquire 21
         
  Medical Services      
   18O for total body water measurement – duplicate equilibration 1 mL 14
   18O and 2H of doubly labelled water – duplicate equilibration 1 mL 14
         
  Services for Authentication of Foodstuffs      
   18O of water in fruit juice – priority – triplicate equilibration 10 mL 7
   18O and 2H of water in fruit juice – priority –  triplicate equilibration 10 mL 7
         
  Standard Calibration Services      
   18O of water – 3 days x 5 reps. equilibration 20 mL 21
   18O & 2H of water – 3 days x 5 reps. equilibration 20 mL 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