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Analytical protocols for measurements of isotope ratios involving low-abundance isotopes 174Hf (~0.16%), 180W (~0.12%), and 190Pt (~0.014%) using multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) at ca. tenfold improved precision compared to previous studies are presented. The improvements in precision result in part from the use of Faraday amplifiers equipped with 1012Ω resistors...
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