D and 18O analysis of milligram water samples

✍ Scribed by K. Rozanski; M. Dulinski; J. Rzepka

• Publisher: Elsevier Science
• Year: 1987
• Weight: 271 KB
• Volume: 38
• Category: Article
• ISSN: 0883-2889
• DOI: 10.1016/0883-2889(87)90252-8

✦ Synopsis

Possibilities and limits of the routine preparation lines and procedures for D and ~sO isotope analyses of water samples are thoroughly discussed for the specific case when the mass of the sample is limited to single milligrams. It is demonstrated that the classical CO2-equilibration technique also provides reliable results for masses of water as low as 10 mg. It appears that error in 6 ~so for low-mass water samples is influenced mainly by actual accuracy to which this mass is determined. For equilibration of CO 2 with low-mass water samples an interesting relationship was observed: the equilibration time increased continuously with decreasing mass of water. Some suggestions are put forward in order to explain this intriguing effect.