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- Posts: 11
- Joined: Sat Apr 25, 2015 8:42 am
i want to clean-up my material samples (rubber) to analyse 16 EPA + benzo(j)fl. + Benzo(e)pyrene by GC-MS. We have to measure very low concentrations (0.2 mg/kg per compound).
Does anyone know a clean up methode for the 18 PAH? I've tried several SPE clean-ups with SiOH but hadn't any success with that. Also LC-FLD and GC-MS/MS weren't useful to get a clean chromatogramm.
I read about a method based on two praparative LC-steps: clean up with silica column followed by a clean up with a column filled with sephadex LH-20. It sounds very time- and solvent-intense. Does anybody know this clean up method or have a good alternative?
Thanks!