- Böhlke, J.K., and Coplen, T.B., 1995, Interlaboratory
comparison of reference materials for nitrogen-isotope-ratio measurements,
in Reference and intercomparison materials for stable isotopes of light
elements: Vienna, International Atomic Energy Agency, IAEA-TECDOC-825,
p. 51-66.
- Böhlke, J.K., Gwinn, C.J., and Coplen, T.B., 1993, New
reference materials for nitrogen-isotope-ratio measurement: Geostandards
Newsletter, v. 17, p. 159-164.
- Böhlke, J. K., Mroczkowski, S. J., and Coplen, T. B., 2003,
Oxygen isotopes in nitrate: new reference materials
for 18O:17O:16O measurements and observations
on nitrate-water equilibration: Rapid Communications in Mass
Spectrometry, v. 17, p. 1835-1846.
- Carmody, R.W., and Seal II, R.R., 1999, Evaluation
of the sulfur isotopic composition and homogeneity of the Soufre de
Lacq reference material: Chemical Geology, v. 153, p. 289-295.
(on-line
abstract)
- Coplen, T.B., Brand, W.A., Gehre, M., Gröning, M., Meijer, H.
A. J., Toman, B, and Verkouteren, R. M., in press, New
guidelines for δ13C measurements: Analytical
Chemistry.
- Coplen, T. B., and Clayton, R. N., 1973, Hydrogen
isotopic composition of NBS and IAEA stable isotope water reference
samples: Geochimica Cosmochimica Acta, v. 37, p. 2347-2349.
- Coplen, T.B. and Hopple, J.A., 1995, Audit
of VSMOW distributed by the United States National Institute of Standards
and Technology, in Reference and intercomparison materials for stable
isotopes of light elements: Vienna, International Atomic Energy
Agency, IAEA-TECDOC-825, p. 35-38.
- Coplen, T. B., Kendall, C., and Barnes, I. L., 1982, Comment
on Two new carbonate stable isotope standards, by Irving Friedman, James
O'Neil, and Gerald Cebula, 1982, (in Geostandards Newsletter,
v. 6, p. 11-12): Geostandards Newsletter, v. 6, p. 257-258.
- Coplen, T. B., and Kendall, C., 1982, Preparation
and stable isotope determination of NBS-16 and NBS-17 carbon dioxide
reference samples: Analytical Chemistry, v. 54, p. 2611-2612.
- Coplen, T. B., Kendall, C., and Hopple, J., 1983,
Intercomparison of stable isotope reference samples: Nature,
v. 302, p. 236-238.
- Qi, H., Coplen, T.B., Geilmann, H., Brand, W.A., and Böhlke,
J.K., 2003, Two new organic reference materials
for δ13C and δ15N
measurements and a new value for the δ13C of NBS 22 oil: Rapid Communications in Mass Spectrometry,
v. 17, p. 2483-2487.
- Qi, H.P., and Coplen, Tyler B., 2003, Evaluation
of the 34S/32S ratio of Soufre de Lacq elemental
sulfur isotopic reference material by continuous flow isotope-ratio
mass spectrometry: Chemical Geology, v. 199, p. 183-187. (on-line
abstract)
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