NBS22

• Unit Size: 1 ml
• Price per Unit: 200 EUR
• Report: n.a.
• Date of Release: 9/1/1983
• Reference Sheet: download (pdf)
• Contact point: NA-EL.Reference-Materials.Contact-Point@iaea.org

NBS22 is a secondary reference material. Its intended use is as calibrant when δ¹³C and δ²H are determined in organic materials using IRMS (Isotope Ratio Mass Spectrometry) coupled with an EA (Elemental Analyser) and Pyrolizer, for obtaining traceability of the data to the VPDB δ¹³C scale and VSMOW-SLAP δ²H scale, respectively. NBS 22 was prepared by S. Silverman, Chevron Oil Company, La Habra, California [1]. Details about the characterization of NBS22 are reported in [2] and [3]. 

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References:

1. ​SILVERMAN, S.R., "Investigations of petroleum origin and evolution mechanisms by carbon isotope studies", Isotopic and Cosmic Chemistry (CRAIG, H., MILLER, S.L., WASSERBURG, G.J., Eds.), North Holland, (1964) 92-102.
2. COPLEN, T.B., BRAND, W.A., GEHRE, M., GRÖNING M., MEIJER, H.A.J., TOMAN, B., VERKOUTEREN, R.M., New Guidelines for ¹³C Measurements, Anal. Chem. 78 7 (2006) 2439-2441.
3. SCHIMMELMANN, A., QI H., COPLEN, T.B., BRANDT, W.A., FONG, J., MEIER-AUGENSTEIN, W., KEMP, H.F., TOMAN, B., ACKERMANN, A., ASSONOV, S., AERTS-BIJMA, A.T., BREICHA, R., CHIKARAISHI, Y., DARWISH, T., ELSNER, M., GEHRE, M., GEILMANN, H., GROENING, M., HELIE, J.F., HERRERO-MARTIN, S., MEIJER, H.A.J., SAUER, P.E., SESSION A.L., WERNEN R.A. Organic Reference Materials for Hydrogen, Carbon, and Nitrogen Stable Isotope-Ratio Measurements: Caffeines, n‑Alkanes, Fatty Acid Methyl Esters, Glycines, L‑Valines, Polyethylenes, and Oils. Anal. Chem. 88 (2016) 4294−4302