Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1246040 | Talanta | 2007 | 7 Pages |
Abstract
Iron isotope fractionation between liquid and vapor iron pentacarbonyl was measured in a closed system at â¼0 and â¼21 °C to determine if Fe isotope analysis of iron pentacarbonyl vapor is viable using electron-impact, gas-source mass spectrometry. At the 2Ï level, there is no significant Fe isotope fractionation between vapor and liquid under conditions thought to reflect equilibrium. Experiments at â¼0 °C indicate iron pentacarbonyl vapor is â¼0.05 per mil (â°) greater in 56Fe/54Fe than liquid iron pentacarbonyl, which is just resolvable at the 1Ï level. Partial decomposition of iron pentacarbonyl vapor or liquid to an iron oxide or iron metal shows that significant isotopic fractionation occurs, where the decomposed product has a lower 56Fe/54Fe ratio as compared to the starting iron pentacarbonyl. It follows that methods to decompose iron pentacarbonyl must be quantitative to obtain accurate isotope values.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
René A. Wiesli, Brian L. Beard, Paul S. Braterman, Clark M. Johnson, Susanta K. Saha, Mahadeva P. Sinha,