Interlaboratory comparison of reference materials for nitrogen-isotope-ratio measurements
January 1, 1995
Aliquots of seven different reference materials were distributed for an interlaboratory comparison of stable nitrogen-isotope-ratio measurements. Results from 15 laboratories were compiled and evaluated selectively to yield provisional values of 515N for each material, i, with respect to atmospheric N2 (o1SN,7air). The 515N values reported by the different laboratories are correlated in such a way that some of the major discrepancies may be removed by normalization (/. e., by altering the length of the ô N scale for each laboratory by an amount defined by local measurements of reference materials with extreme values).
Citation Information
Publication Year | 1995 |
---|---|
Title | Interlaboratory comparison of reference materials for nitrogen-isotope-ratio measurements |
Authors | J.K. Böhlke, Tyler B. Coplen |
Publication Type | Report |
Publication Subtype | Other Government Series |
Index ID | 70188273 |
Record Source | USGS Publications Warehouse |
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John Karl Bohlke, PhD
Emeritus Scientist, Earth Systems Processes Division
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Tyler B. Coplen, Ph.D.
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John Karl Bohlke, PhD
Emeritus Scientist, Earth Systems Processes Division
Emeritus Scientist, Earth Systems Processes Division
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Tyler B. Coplen, Ph.D.
Research Chemist
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