A rapid method for determination of hydrogen and oxygen isotope ratios from water and hydrous minerals

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• 作者：Sharp ; Z.D. ; Atudorei ; V. ; Durakiewicz ; T.
• 关键词：Stable isotopes ; Gas chromatography ; Methodology ; Carbon reduction ; In situ ; Fluid inclusions
• 刊名：Chemical Geology
• 出版年：2001
• 出版时间：August 1, 2001
• 年：2001
• 卷：178
• 期：1-4
• 页码：197-210
• 全文大小：419 K

文摘

A general-purpose, on-line, continuous flow method for determination of δD and δ¹⁸O values of water and hydrous minerals is described. Minor modifications of commercially available equipment allow for analyses of water and solid samples, fluid inclusions and in situ hydrogen isotope determinations of hydrous minerals using a laser. The technique involves reduction of H₂O or solid hydrous samples by reaction with glassy carbon at high temperatures. H₂ and CO are produced by reaction with the carbon at 1450°C in a helium carrier gas. Product gases are separated in a gas chromatograph and analyzed in a mass spectrometer configured to make hydrogen isotope analyses in continuous flow mode.