| 海洋样品中~(231)Pa和U,Th同位素的联合分离测定 |
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| 引用本文： | 郑爱榕,施文远,黄奕普.海洋样品中~(231)Pa和U,Th同位素的联合分离测定[J].热带海洋学报,1992(1). |
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| 作者姓名： | 郑爱榕 施文远 黄奕普 |
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| 作者单位： | 厦门大学海洋系，厦门大学海洋系，厦门大学海洋系 厦门 361005，厦门 361005，厦门 361005 |
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| 摘 要： | 本文结合已报道的U,Th分离方法和~(231)Pa分离条件建立了Th-Pa-U联合分离流程和测试技术,并用以分离测定一个锰结核和一个深海沉积物样品中的~(231)Pa,U和Th同位素含量的深度分布。用~(231)pa_(ex),~(230)Th_(ex)和~(230)Th_(ex)/~(232)Th法分别计算该锰结核的生长速率为1.5,0.9和1.5mm/Ma。U,Th和~(231)Pa的化学回收率(％)分别为40—80,80—92和60—86。
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| 关 键 词： | 锰结核 沉积物 ~(231)Pa U Th 分离 测定 |
STEPWISE SEPARATION AND DETERMINATION OF (231)~pa ISOTOPES OF U AND Th IN MARINE SAMPLES |
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| ZHENG Airong SHI Wenyuan HUANG Yipu.STEPWISE SEPARATION AND DETERMINATION OF (231)~pa ISOTOPES OF U AND Th IN MARINE SAMPLES[J].Journal of Tropical Oceanography,1992(1). |
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| Authors: | ZHENG Airong SHI Wenyuan HUANG Yipu |
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| Abstract: | Combing the published method of determing isotopes of U and Th with the condition of separating 231Pa, a new method was established to separate and determinate 231Pa, isotopes of U and Th simultaneouly.The profiles of U, Th and 231Pa in a deep-sea manganese nodule and in a sample of the deep-sea sediment were determined, respectively, using the method. The growth rates of the manganese nodule were 1.5, 0.9 and 1.2mm/M.yr. separately, through the methods of 231Paex, 230Thex and 230Thex/232Th. The recoveries of U, Th and 231Pa were in the range of 40-80, 80-92 and 60-86% respectively. |
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| Keywords: | manganese nodule sediment 231~Pa U Th separation determination |
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