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讨论了铼-锇同位素稀释法测定黑色页岩年龄的溶样方式,比较了王水和不同温度下CrO3-H2SO4的Carius管溶样技术,通过改进流程将铼空白控制在10pg之内,并结合高灵敏度的电感耦合等离子体质谱分析手段,初步研究建立了一种用CrO3-H2SO4溶剂准确测定黑色页岩年龄的方法。
The method of isotope dilution rhenium - osmium dilution method for determining the age of black shale was discussed. The comparison between aqua regia and Carius tube - dissolving technology of CrO3 - H2SO4 at different temperatures was carried out. The rhenium blank was controlled within 10 pg by improving the process, High sensitivity ICP-MS method, a method for accurately determining the age of black shale using CrO3-H2SO4 solvent has been established.