Recommendations and Protocols for the Use of the Isotope Ratio Infrared Spectrometer (Delta Ray) to Measure Stable Isotopes from CO<sub>2</sub>: An Application to Volcanic Emissions at Mount Etna and Stromboli (Sicily, Italy)

<div>Assumption on the use of distinct gas samplers to perform analysis with the Delta Ray IRIS: (a) Multi-Layer bag (&gt;1 L), (b) stainless steel sampler (≈100 mL), (c) glass sampler (≈50 mL), and (d) Exetainer vials (12 mL). (e) Estimation of the minimum volume of gas required to obtain precise (99% and 95% of the maximum precision) and accurate measurements in function of the dilution tube (or without) for the full range of CO<sub>2</sub> contents from 200 ppm to 100%. Green-filled cells for accurate gas samplers. Red-filled cells for inaccurate gas samplers. In the last case, the reported exposant highlights either the number of similar gas samplers required to perform the analysis (see text for explanations).</div>

Geofluids

fig8

Figure 8

Figure 8: Recommendations and Protocols for the Use of the Isotope Ratio Infrared Spectrometer (Delta Ray) to Measure Stable Isotopes from CO<sub>2</sub>: An Application to Volcanic Emissions at Mount Etna and Stromboli (Sicily, Italy) 

Figure 8 | Recommendations and Protocols for the Use of the Isotope Ratio Infrared Spectrometer (Delta Ray) to Measure Stable Isotopes from CO2: An Application to Volcanic Emissions at Mount Etna and Stromboli (Sicily, Italy) 