Kerridge J F, Chang S, Shipp R
Institute of Geophysics, University of California, Los Angeles 90024, USA.
Geochim Cosmochim Acta. 1988;52:2251-5. doi: 10.1016/0016-7037(88)90127-5.
Isotopic analyses of residues prepared by demineralisation of the Murchison meteorite using D-labelled reagents provide evidence for measurable exchange of H-isotopes between residue and reagents. Precise quantification of this effect is precluded by substantial inhomogeneity of the meteoritic organic matter. A conservative estimate of the degree of exchange is 3 to 5% of the H pyrolysable as H2O. This could affect the shape of the curve defining D-release as a function of temperature, but does not change conclusions previously drawn concerning the nature of the bulk D-enrichment of insoluble organic matter in meteorites.
使用D标记试剂对默奇森陨石进行脱矿处理后制备的残留物的同位素分析，为残留物与试剂之间可测量的H同位素交换提供了证据。陨石有机物质的显著不均匀性使得无法对这种效应进行精确量化。交换程度的保守估计是可作为H₂O热解的H的3%至5%。这可能会影响定义D释放随温度变化的曲线形状，但不会改变先前关于陨石中不溶性有机物质大量D富集性质得出的结论。
