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|Title:||Si Primary Standards for the Calibration of Ion-Current Ratios in the Molar-Mass Measurement of Natural Si Single Crystals|
|Authors:||VALKIERS Staf; MANA G.; FUJII K.; BECKER P.|
|Citation:||METROLOGIA vol. 48 no. 2 p. S26-S31|
|Publisher:||IOP PUBLISHING LTD|
|Type:||Articles in periodicals and books|
|Abstract:||A procedure is described to obtain Si-traceable silicon isotope amount in the BaSiF6 form. On the basis of a gravimetric approach, three synthetic isotope mixtures were made, very similar tot natural Si, by blending silicon isotopically enriched 28Si, 29Si and 30Si. These mixtures served as references to calibrate measurements of (SiF3) + current ratios. In this way, it was possible to make SI-traceable measurements of silicon isotope amount-ratios, without any assumptive correction. The isotopic composition of the naural Si crystal WASO17.2 was remeasured and its molar mass was redetermined.|
|JRC Institute:||Institute for Reference Materials and Measurements|
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