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Precise determination of Pb isotope ratios by simple double spike MC-ICP-MS technique without Tl addition
| Content Provider | CSIR - National Institute of Oceanography (NIO) |
|---|---|
| Author | Makishima, A. Nath, B. N. Nakamura, E. |
| Abstract | A double-spike multicollector ICP-MS (DS-MC-ICP-MS) technique for Pb isotope analysis without Tl addition is established and its analytical performance is examined in detail. This simple DS-MC-ICP-MS technique using 20 ng ml sup(-1) gave averages of 16.9417, 15.4988 and 36.7196 with reproducibilities of 0.007, 0.008 and 0.009 % (RSD, n = 35), respectively, for sup(206) Pb / sup(204)Pb, sup(207) Pb / sup(204) Pb and sup(208) Pb / sup(204) Pb in NIST 981 solution, corresponding to consumption of 4 ng of Pb in a pair of spiked and non-spiked measurements. The average is consistent with those obtained by previous studies by DS-TIMS and DS-MC-ICP-MS with Tl addition. The reproducibility (RSD %) of sup(206) Pb / sup(204) Pb, sup(207) Pb / sup(204) Pb and sup(208) Pb / sup(204) Pb improves from 0.26, 0.54 and 0.69 % to 0.0022, 0.0030 and 0.0029 % as the Pb consumption during analysis increases from 20 pg to 11 ng. The reproducibility with 11 ng is similar to or even better than those by DS-TIMS, MC-ICP-MS with Tl addition, or with DS-Tl addition. The accuracy of the simple DS-MC-ICP-MS technique for Pb, including the column chemistry, is further confirmed by analysis of actual silicate sample, JB-3. |
| Starting Page | 407 |
| Ending Page | 410 |
| Page Count | 4 |
| File Format | |
| Journal | Journal of Analytical Atomic Spectrometry |
| Volume Number | 22 |
| Language | English |
| Publisher | The Royal Society of Chemistry |
| Access Restriction | Authorized |
| Subject Keyword | Lead isotopes Chemical analysis Analytical techniques Accuracy fluorescence spectroscopy Geochemical analysis |
| Content Type | Text |
| Resource Type | Article |
