Hydrogen isotope analysis of natural abundance and deuterium-enriched waters by reduction over chromium on-line to a dynamic dual inlet isotope-ratio mass spectrometer.
This paper describes the application of a simple chromium reduction furnace which can be interfaced with a dual inlet isotope-ratio mass spectrometer thus providing the capacity for cheap, fast, accurate and precise measurement of deltaD(V-SMOW) by dynamic mass spectrometry. Measurements are precise to the order of < or =0.5 per thousand. Mean 95% confidence intervals for the Vienna Standard Mean Ocean Water (V-SMOW) to Standard Light Antarctic Precipitation (SLAP) range are in the order of 2.5 per thousand and the system is linear over the range -428 to 23,000 per thousand. Memory effects do exist, but are small for natural abundance samples and can be minimised by careful planning of the analytical load.
Donnelly
T
T
Scottish Universities Environmental Research Centre (SUERC), East Kilbride, Glasgow, G75 0QF, UK.
Waldron
S
S
Tait
A
A
Dougans
J
J
Bearhop
S
S
D002857:Chromium / Q000737:chemistry*; D003903:Deuterium / Q000032:analysis*; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D006859:Hydrogen / Q000032:analysis*; D007554:Isotopes / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods*; D010084:Oxidation-Reduction; D014867:Water / Q000032:analysis* / Q000737:chemistry
D007554:Isotopes; D014867:Water; D002857:Chromium; D006859:Hydrogen; D003903:Deuterium