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Description
These Reference Materials (RMs) are intended for use in developing and validating methods for measuring relative differences in nitrogen (N) and oxygen (O) isotope-amount ratios in nitrate. While the values for these RMs are not certified, their widespread use permits comparability of data from different laboratories. Equivalent names used by the International Atomic Energy Agency (IAEA) and the U.S. Geological Survey (USGS) for these RMs are listed in column 2 of Table 1. RM 8549 is supplied in plastic vials containing approximately 0.4 g of KNO3 salt. RMs 8558 and 8568 are supplied in glass bottles containing approximately 0.9 g of KNO3 while RM 8569 is supplied in glass bottles containing approximately 0.9 g of NaNO3.
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Certificate of Analysis (specimen)
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Product data sheet
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NIST provides over 1300 Standard Reference Materials® as well as articles and practice guides describing the development, analysis and use of SRMs.
NIST Standard Reference Materials are used by analytical laboratories in industry, academia and government in order to facilitate commerce and trade and to advance research and development. The SRMs are produced by the engineering laboratory, the material measurement laboratory, and the physical measurement laboratory at NIST. They are available for chemical composition, physical properties, and engineering materials.