Sample preparation and chromatographic separation for Sr, Nd, and Pb isotope analysis in geological, environmental, and archaeological samples

[摘要] In countless modern geochemical studies, diverse biological and geologic samples are analyzed for Sr, Nd, and Pbisotopic composition. Such heterogeneity presents challenges for a “one-size-fits-all” approach to sample preparation,necessitating customization of sample preparation and chromatographic separation methods. We present (1) digestiontechniques for low-Nd silicates, carbonatites, carbonates, water, plant and wood material, organic soils, aerosols collected via filtration, as well as archaeological samples (alloys, teeth, and bones) (2) a column chromatographic approachfor samples with low concentrations (large amounts of a matrix) and (3) method verification via replicate analyses of awide variety of isotopic standards.

[学科分类] 自动化工程

[关键词] strontium;neodymium;lead;chemical separation;isotopic analyses;TIMS