(2020) Sub-Nanogram Pb Isotope Analysis of Individual Melt Inclusions
Bracco Gartner AJJ, Davies GR & Koornneef JM
07e: Room 2, Monday 22nd June 22:27 - 22:30
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On slide 4 you mention using anion-exchange chromatography to purify the Pb in your samples. Can you talk a little more about observed or expected loss of Pb during this process when you're trying to analyze sub-nanogram levels of Pb?
Dear Sophia, Thanks for your question. We do in deed expect some (minor) loss of Pb during chromatography. And because we add the Pb double spike after chromatography, we need an estimate of the Pb recovery to accurately calculate concentrations. So we carried out several tests to quantify the Pb recovery. These indicate a Pb yield of 96.5 ± 2.7% (2 SD) during the procedure (see slide 9). We propagate this uncertainty in the Pb concentration calculations. I hope this answers your question. Please do let me know if you have any more. Kind regards, Antoine
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