ucla epss geochem

Brief summary of laboratory facilities


MC-ICPMS: ThermoFinnigan Neptune. This instrument is used to measure isotope ratios of Mg, Si, Cl, Fe, Mg, Pb and Hf, thus far in our laboratory.

Cetac Aridus desolvating nebulizer is shown in the forground of this photo. Former UCLA PhD student Justin Simon is shown working in background. We use the desolvating nebulizer for reduction of hydride and oxide interferences, especially for Fe and Si isotope ratio analysis.
ArF Laser Ablation System attached to MC-ICPMS. This system is used for in-situ analysis of Mg, Si, Pb, and Hf isotope ratios at present.
Laser Fluorination line attached to ThermoFinnigan Delta gas-source MS. This line utilizes a 25W CO2 laser and O2 as the analyte. Analysis of O2 permits us to measure 17O/16O and 18O/16O in meteoritical samples. Precision for both ratios is on the order of 0.02 per mil. Sample size is generally in the range of 0.5 mg.
Ultraviolet laser ablation fluorination system with He carrier flow delivery to a ThermoFinnigan MAT 253 gas-source mass spectrometer. The interface between vacuum line on the right and He carrier flow system is shown here. This system provides for 100 micron diameter laser ablation pits in silicates and oxides with 0.2 per mil precision in both oxygen isotope ratios.
ThermoFinnigan GasBench system for automated carbonate oxygen and carbon isotope ratio analysis. This system has produced more than 2,000 isotopic analyses of carbonates. The MAT 253 mass spectrometer is shown behind the Gasbench.
Cation separation columns used to purify Mg for isotopic analysis in our Class 100 clean laboratory.