Hi All, I need some TCEA help. Our TCEA is pretty new but very sporadically used and I have yet to develop good practices. Each time I come back to it I seem to have to start from scratch! I need some advice on basics such as what backgrounds are acceptable, what precisions are acceptable, what tailing is normal, etc. I need info on running organics for dD and d18O. Does someone have lab methods / standard operating procedures that they can share? I realize that is beyond a normal Isogeochem request so I am willing to pay for advice (maybe hire someone as a consultant?). Thanks on this Friday afternoon (after a week of trying to figure it out and a pile of samples waiting!). Jason Jason Curtis, Ph.D. Stable Isotope Mass Spec Lab manager Senior Associate-In Geochemistry Department of Geological Sciences University of Florida Gainesville, FL 32611 +1-352-275-8642