NBS 28 , Quarz Sand

Materials with known ²H, ¹³C, ¹⁵N and ¹⁸O isotopic composition

• Unit Size: 0.5 g

NBS 28 was obtained by I. Friedman, U.S. Geological Survey from Corning Glass Company. It was washed with acid to remove impurities and the fraction between 100 μm and 177 μm was separated and packaged. The material serves as primary calibrator for silicon δ³²Si measurements and its ³²Si/³⁰Si ratio defines the zero point of the δ³²Si scale [1,2].

(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)
[1] VSMOW scale
[?] by definition

References:

1. HUT, G., Consultants' Group Meeting on Stable Isotope Reference Samples for Geochemical and Hydrological Investigations, Vienna, Austria, 16 - 18 September 1985. Report to the Director General, International Atomic Energy Agency, Vienna (1987).

2. GR?NING, M., "International stable isotope reference materials", Handbook of stable isotope analytical techniques, Volume I, Chapter 40, (De Groot, P.A., Ed.), Elsevier (2004) 874-906.