Isogeochemists, We are currently running a laser carbonate system (CF-IRMS with a 75watt CO2 Merchantek laser ). We need to redesign the laser cell to be able to handle larger sample sizes. We would like any information/advice on the properties and costs and people's experience with different cell windows and cell designs. I've searched the archives and laser ablation of carbonates was last mentioned way back in 1995. Thanks Kim Kim Baublys Stable Isotope Laboratories Department Of Earth Sciences University of Queensland 4072 Australia Ph: +61 7 3365 1131 Fax: +61 7 3365 1277 http://www.uq.edu.au/geochem/