²H and ¹⁸O in water samples

IAEA-304, ¹⁸O Labelled Water

Unit Size: 2 x 10 ml
Price per Unit: 130 €
Report: NAHRES-5
Date of Release: 1989
Reference Sheet (pdf)

Reference material IAEA-304 consists of two ¹⁸O-labelled water samples (A and B), which were made from enriched ¹⁸O water by dilution with distilled water having the naturally occurring isotopic abundance. The isotopic labeling was checked by CO₂ isotopic exchange. The samples are sterile and pyrogen free. The values listed above were established on the basis of statistically valid results submitted by laboratories which had participated in an international inter-comparison exercise organized by the Section of Nutritional and Health Related Environmental Studies [1].

Analyte	Value	Unit	95% C. I.	N	R/I/C
18O (Amp. A)	251.7	δDVSMOW1	249.2 - 254.2	15	R
18O (Amp. B)	502.5	δDVSMOW1	498.9 - 506.1	14	R

[1] The isotopic compositions are given in parts per thousand difference from isotope ratio standard Vienna Standard Mean Ocean Water (VSMOW)
(N) Number of accepted laboratory means which were used to calculate the recommended or information values and their respective confidence intervals about the mean value
(R/I) Classification assigned to the property value for analyte (Recommended/Information)

References:

1. Parr R.M., Clements S.A. (1991): Intercomparison of enriched stable isotope reference materials for medical and biological studies, IAEA Report NAHRES-5, International Atomic Energy Agency, 31 pp.