NSVEC is N2 gas sealed in glass ampules (about 7 ml), to be used for δ15N calibration purposes.
NSVEC is a pure tank gas and was originally prepared by G. Junk and H. J. Svec, Iowa State University, USA [1]; C. Kendall, U.S. Geological Survey then split the sample into several hundred aliquots [2]. The δ15N value of this reference material is the result of the statistical evaluation of an interlaboratory comparison [3].
| Analyte | Value | Unit | SD | R/I/C |
|---|
| δ15N | -2.78 | ‰ | 0.04 | C |
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)
References:
JUNK, G., SVEC, H.J., The absolute abundance of the nitrogen isotopes in the atmosphere and compressed gas from various sources, Geochim. Cosmochim. Acta 14 (1958) 234-243
KENDALL, C., GRIM, E., Combustion tube method for measurement of nitrogen isotope ratios using calcium oxide for total removal of carbon dioxide and water, Anal. Chem. 62 (1990) 526-529.
BÖHLKE, J.K., COPLEN, T.B., Interlaboratory comparison of reference materials for nitrogen isotope ratio measurements. Proceedings of a consultants meeting held in Vienna, 1 - 3. Dec. 1993, IAEA-TECDOC-825, IAEA, Vienna, Austria (1995) 51-66.
