Measurement of extremely ²H‐enriched water samples by laser spectrometry: application to batch electrolytic concentration of environmental tritium samples

Abstract

The ability to quickly and accurately measure extremely (2) H-enriched waters by laser spectrometry will facilitate the use of deuterium as a tracer in numerous environmental and other applications. For low-level tritium operations, this new analytical ability facilitated a 10-20 % increase in sample productivity through the elimination of spike standards and gravimetrics, and provides immediate feedback on electrolytic enrichment cell performance. Copyright © 2016 John Wiley & Sons, Ltd.

Routine high‐precision analysis of triple water‐isotope ratios using cavity ring‐down spectroscopy

“…Commercial LAS instruments, by contrast, present limited options to the user and, instead, manufacturers provide a software package with recommended default settings and very little room for optimization. Indeed, for most researchers interested in the δ 2 H and δ 18 O values of water, the default mode is sufficient, provided that care is taken with the influence of memory [8][9][10][11] and organic contaminants. [12,13] Researchers have suggested optimization strategies for water injection, [14] run design, [15] and data reduction.…”

The study of isotopic enrichment of water in human plasma and erythrocyte

“…To overcome these obstacles and gain measurements of a natural abundance of stable isotopes hydrogen and oxygen in waters from human blood samples routinely, we adopt Wassenaar et al methodology 38 that measures stable isotopic ratios of 2 H and 18 O using a laser‐based spectrometer. Previously, Wassenaar and co‐workers demonstrated using the Off‐Axis Integrated Cavity Output Spectroscopy (OA‐ICOS) laser spectrometry 32,33 to obtain accurate and precise δ 2 H values from water samples swiftly 38 . Therefore, we chose to use the commercial OA‐ICOS laser absorption spectrometer to obtain the stable isotope ratios of 2 H and 18 O from the collected water samples (Tables 1, 2, and Table S1).…”

“…However, most IRMS laboratories hesitate to measure natural isotopic enrichment of waters due to possible contamination from sample preparation, especially the blood samples, and also requires large sample water volume (>500 µL). To overcome these obstacles and gain measurements of a natural abundance of stable isotopes hydrogen and oxygen in waters from human blood samples routinely, we adopt Wassenaar et al methodology 38 that measures stable isotopic ratios of 2 H and 18 O using a laser‐based spectrometer. Previously, Wassenaar and co‐workers demonstrated using the Off‐Axis Integrated Cavity Output Spectroscopy (OA‐ICOS) laser spectrometry 32,33 to obtain accurate and precise δ 2 H values from water samples swiftly 38 .…”

“…demonstrated using the Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) laser spectrometry 32,33 to obtain accurate and precise δ 2 H values from water samples swiftly. 38 Therefore, we chose to use the commercial OA-ICOS laser absorption spectrometer to obtain the stable isotope ratios of 2 H and…”

High Hydrogen Isotope Separation Efficiency: Graphene or Catalyst?

“…At a certain applied direct current–voltage, water will be electrolytically decomposed into oxygen and hydrogen, accompanying with the heavy hydrogen isotopes, deuterium and tritium, being separated from the light isotope, protium. In our work, ultrapure water with deuterium of ∼1200 ppm and tritium of ∼1500 Bq L –1 was selected as the electrolytic feed, and such concentrations or activities could be precisely measured using OA-ICOS and LSC, both of which were recommended by the International Atomic Energy Agency (IAEA) for hydrogen isotope measurement . The current density for each cell was fixed at 500 mA cm –2 , and adequate water samples for offline measurement were collected at 5 h intervals for H/D and at 10 h intervals for H/T.…”