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  • The chemical preparation and characterization of specimens for absolute measurements of the molar mass of an element exemplified by silicon for redeterminations of the Avogadro constant


The chemical steps needed to prepare specimens for absolute atomic weight (mean relative atomic mass) determinations are outlined and discussed in detail for the atomic weight of silicon A(r)(Si), as recently measured for a a redetermination of the Avogadro constant. The estimated combined uncertainties arising from the chemical procedures in these A(r)(Si) measurements are shown to be almost equal to those from the associated mass spectrometric measurements.

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Authors: DE BIEVRE P, JRC Petten (NL);LENAERS G, JRC Petten (NL);MURPHY T J, JRC Petten (NL);PEISER H S, JRC Petten (NL);VALKIERS S, JRC Petten (NL)
Bibliographic Reference: Article: Metrologia, Vol. 32 (1995) pp. 103-110
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