Dana- I have had a similar experience as Eleazar. The most important factor seems to be the cap- and getting a good seal (see ISOGEOCHEM archives). Cheers, Al On 6/23/11 6:09 PM, Eleazar Padrón wrote: > I have used both with identical results for 18O and 2H. > > Best regards, > > Eleazar > > El 23/06/2011 21:17, Dana Biasatti escribió: >> Can anyone tell me if there is an advantage in using the >> flat-bottomed exetainer vials rather than the round-bottom vials for >> running water samples on the gas bench? > > > > > > Eleazar Padrón González > > Instituto Tecnológico y de Energías Renovables, S.A. (ITER, S.A.) > > Polígono Industrial de Granadilla, s/n 38600 - Granadilla de Abona > Santa Cruz de Tenerife - España (Spain) > > *TEL:* + 34 922-747-700; *FAX:* +34 922-747-701 > > www.iter.es <http://www.iter.es> > > Antes de imprimir este e-mail piense bien si es necesario hacerlo. El > medioambiente es cosa de todos. > > Please consider your environmental responsibility. Before printing > this e-mail, ask yourself whether you really need a hard copy. > > > ADVERTENCIA: > > La información incluida en este e-mail es CONFIDENCIAL, siendo para > uso exclusivo del destinatario arriba mencionado. Si Usted lee este > mensaje y no es el destinatario indicado, le informamos que está > totalmente prohibida cualquier utilización, divulgación, distribución > y/o reproducción de esta comunicación sin autorización expresa en > virtud de la legislación vigente. Si ha recibido este mensaje por > error, le rogamos nos lo notifique inmediatamente por esta misma vía a > *GRUPO ITER, S.A.* y proceda a su eliminación. > > > DISCLAIMER: > > This message is intended exclusively for its addressee and may > contain information that is CONFIDENTIAL and protected by professional > privilege. If you are not the intended recipient you are hereby > notified that any dissemination, copy or disclosure of this > communication is strictly prohibited by law. If this message has been > received in error, please immediately notify us via e-mail to *GRUPO > ITER, S.A.* and delete it. > > -- Assistant Professor Iowa State University Department of Geological& Atmospheric Sciences Room 12, Science I Ames, IA 50011-3212, USA Email: [log in to unmask] Phone: (515) 294-5142 Fax: (515) 294-6049 Stable Isotope Laboratory and Research Group http://www.ge-at.iastate.edu/siperg/index.html Phone: (515) 294-6090