Fast high‐precision on‐line determination of hydrogen isotope ratios of water or ice by continuous‐flow isotope ratio mass spectrometry
| Autor: | Markus Leuenberger, Christof Huber |
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| Rok vydání: | 2003 |
| Předmět: |
Time Factors
Aqueous solution Chemistry Ice Organic Chemistry Analytical chemistry Water Reference Standards Deuterium Mass spectrometry Sensitivity and Specificity Mass Spectrometry Analytical Chemistry Ice core Calibration Vaporization Range (statistics) Isotope-ratio mass spectrometry Spectroscopy Hydrogen Line (formation) |
| Zdroj: | Rapid Communications in Mass Spectrometry. 17:1319-1325 |
| ISSN: | 1097-0231 0951-4198 |
| Popis: | A new fast high-precision on-line technique is described for the determination of hydrogen isotope ratios of water by continuous-flow mass spectrometry. For the first time H(2)/H(2)O-equilibration using a platinum catalyst has been used in a fully continuous process. A significant reduction in the H(2)/H(2)O-equilibration time is achieved by a complete vaporization of the water and by increasing the exchange temperature to 100 degrees C. The analysis time is only approximately 5 min/sample which includes equilibration and processing. Measurement precision and accuracy are better than 1 per thousand and sample consumption is only approximately 5 microL. This new technique allows the measurement of a wide range of aqueous samples either in a semi-continuous way (discrete samples are injected one after another) or in a fully continuous way. This allows us, for the first time, to make continuous measurements of ice cores. |
| Databáze: | OpenAIRE |
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