Boron Isotopic Analysis of Proposed Borosilicate Mineral Reference Samples |
| |
| Authors: | William P Leeman Sonia Tonarini |
| |
| Institution: | Keith-Wiess Geological Laboratories, Rice University, Houston, TX 77005 USA. e-mail:;Istituto Geocronologia et Geochimica Isotopica, C.N.R., Via Moruzzi, 1, 52124 Pisa, Italy |
| |
| Abstract: | This brief contribution presents new boron isotopic data for a set of proposed borosilicate reference minerals, most of which are described in the companion paper by Dyar et al.2001. The results for a variety of minerals (tourmalines, danburite, prismatine, serendibite, ferroaxinite and a Li mica) show that it is generally possible to reproduce the 11 B/10 B ratio within ± 0.5 per mil with replicate chemistry and mass spectrometry over long time spans. Because the accuracy of boron isotopic analysis is commonly determined by reference to secondary standards, it is suggested that some of the samples used in this study be adopted for interlaboratory comparisons and for quality control on boron isotopic analyses produced by a variety of analytical methods. |
| |
| Keywords: | boron isotopes minerals reference materials TIMS SRM 9 51 high precision |
|
|
