Dear Isogeochemists, I've big problems with autosampler of the TC/EA Finnigan: a) continuos jams of the carousel; b) undisiderables nitrogen (14N*2) and hydrogen ghost peaks.... Where I can find firms that distributes multi-autosamplers (more than 30 samples) with 'zero-blank' background? Best Regards. Tiziano. *** Tiziano Boschetti Dipartimento di Scienze della Terra - Università di Parma (Earth Sciences Department - University of Parma) Parco Area delle Scienze 157a 43100 Parma, ITALY Fax: +39-(0)521-905305 e-mail1: [log in to unmask] e-mail2: [log in to unmask]