(2020) Accurate Analysis of Lithium Isotopic Ratios in Geological Samples with High Precision
Lin J & Liu Y
06d: Room 2, Thursday 25th June 05:30 - 05:33
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Dear Dr Lin, Did you use line scans, stationary holes, or both for this study? What size was the sampled volume?
Thanks for your question. The experimental results in my talk were obtained by line scans, but we also did the experiments by spot analysis. The non-matrix matched calibration was also applicable. About the sampled volume, we did not calculate it, but we can measure it in the future, keep in touch. My e-mail is email@example.com.
From a practical perspective, the addition of H2O upstream from the ablation cell would appear to be very problematic. How well does it work in practice? Does the cell accumulate water over time? Do samples appear to visibly react to the water (e.g. oxidation of iron) and if so, would you comment on whether the technique is effectively destructive for the sample?
Please see the answer below.
From a practical perspective, the addition of H2O upstream from the ablation cell would appear to be very problematic. I realise that only a small amount is being added, but how manageable do you find it to be in practice? Does the cell accumulate water droplets over time? Is there a risk of operator error flooding the cell with water? Do samples appear to visibly react to the water (e.g. soluble phases, or oxidation of iron) and if so, would you comment on whether the technique is potentially destructive for the entire sample?
Thanks for your thoughtful question. From your question, I can see that you are very interested in our study, and we are so glad. The calculated introduction rate of water was about 3.68 ul min-1, it is a very samll amout, thus water droplets cannot be accumulated in the cell. There may be another reason that the water can be taken into the ICP-MS with the high flow rate of carrier gas (He). Based on the above reasons, there is not the risk of flooding the cell with the water at all. We did not see the samples can react with the samples. My answer may not satisfy your curiosity about our study, and you are welcomed to our lab to visit and study.
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