《Table 1 Optimized condition of three sample preparation methods》

《Table 1 Optimized condition of three sample preparation methods》   提示：宽带有限、当前游客访问压缩模式
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《中国原子能科学研究院加速器质谱实验室的~(14)C样品制备技术研究进展》


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In order to satisfy 14C measurement with the new developed 200kV single stage electrostatic accelerator mass spectrometer，the sample preparation processes for 14C were investigated.The graphitization experimental conditions for H2-Fe，Zn-Fe and Zn-H-Fe methods were optimized on self-designed 14C sample preparation system.The beam current of 12C-for all prepared samples can reach 15-40μA and its stability is better than0.2%.The 14C measurement shows that the lower ratio of(12CH-+13C-）/12 C-benefits the high sensitive and miniaturization device.The result also shows that the Zn-Fe method can depress the ratio of(12CH-+13C-）/12C-for the samples with the carbon content less than 1mg，while，for the carbon content among 1 mg to5mg，the Zn-Fe and Zn-H-Fe methods have the equivalent effect.Through above preparation methods，the yield of carbon can reach more than95%for the carbon content of 100μg-5mg.

图表编号XD0027847200    严禁用于非法目的
绘制时间2019.07.01
作者庞义俊、赵庆章、何明、姜山、杨旭冉、武绍勇、张宇轩、于波、胡畔
绘制单位核物理研究所
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