【摘要】 随着超净化实验室条件的完善以及多接收同位素质谱技术的成熟 ,铅同位素双稀释法倍受关注。用双稀释法测定铅同位素比值的方法原理 ,以及 2 0 4 Pb- 2 0 7Pb双稀释剂的配制和标定方法。通过对标准物质 NBS981和地质样品的分析测定 ,表明用双稀释法测定铅同位素比值 ,可以有效校正由质谱分析造成的同位素分馏效应 ,从而提高分析结果的精度和准确度。更多还原

【Abstract】 Pb isotope analysis of using a 204Pb- 207Pb double thinner has drawn much attention with the ultra-clean chemical laboratory and multi-collector mass spectrometry. The principles of Pb isotope analysis of using a double thinner are introduced, and the method of compound and determination of 204Pb- 207Pb double thinner are presented. The Pb isotopic analyses for standard NBS981 and geological samples suggest that isotopic fractionation caused by mass spectrometry can be corrected effectively by using a 204Pb- 207Pb double thinner and thus improve the precision and accuracy of the analysis.更多还原