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IAEA-303,13C Labelled Sodium-Bicarbonate,碳酸氢钠,IAEA同位素标样 天津欧捷科技有限公司代理奥地利IAEA原子能机构同位素标样,IAEA-303,13C Labelled Sodium-Bicarbonate,碳酸氢钠... IAEA-303,13C Labelled Sodium-Bicarbonate,碳酸氢钠,IAEA同位素标样 Materials with known 2H, 13C, 15N and 18O isotopic
Unit Size: 2 x 3 ml
International Chemical Safety Card (ICSC) : ISCS_1044
Reference material IAEA-303 consists of two sodium bicarbonate reference materials (A and B), which were prepared from NaH13CO3 made up in distilled water and assayed for total CO2 by acidification followed by manometric assay. The isotopic values listed in the table were established on the basis of statistically valid results submitted by laboratories which had participated in an international inter-laboratory comparison organized by the IAEA Section of Nutritional and Health Related Environmental Studies [1].
| Analyte | Value | Unit | 95% C. I. | N | R/I/C |
|---|---|---|---|---|---|
| δ13C (Amp. A) | 93.3 | ‰VPDB1 | 93.3 - 95.4 | 9 | R |
| δ13C (Amp. B) | 466 | ‰VPDB | 460 - 472 | 8 | R |
[1] The isotopic compositions are given in parts per thousand difference from isotope ratio standard Vienna Pee Dee Belemnite (VPDB)
(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:
PARR, R.M., CLEMENTS, S.A., Intercomparison of enriched stable isotope reference materials for medical and biological studies, IAEA Report NAHRES-5, International Atomic Energy Agency, Vienna, Austria (1991).
