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《Journal of Tropical Oceanography》 1982-02
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CHEMICAL PROCEDURE FOR SEPARATING TRACE U AND TH FROM OCEAN SEDIMENTS

Wu Liangji Qin Peiling Liu Shao ( South China Sea Institute of Oceanology, Academia Sinica )Zhang Chenghui Xia Ming ( Institute of Geology, Academia Sinica )  
10 grams of sediment samples are used to some conditional experiments, including removal of organic matter from the samples at high temperature, coprecipitation of U and Th with iron hydroxide, determination of pH of the solution while U and Th are coprecipitated, static time of the copreci-pitation, affecting the recovery of U and Th, etc.A chemical procedure for separating trace U and Th and their isotopes from sediments was worked out. A method of adding standard U and Th into the sample was used. In the procedure the recovery rates of U and Th were 85.9% and 97.6%, respectively.In the procedure, U and Th were separated from the samples, and then their radioactive sources were prepared by electro-deposition. These sources satisfied the requirements of the radioactivity determination.In analyzing the cores of sediments from the continental slope of the South China Sea, isotopes282U-223 Th were added into the sediment samples as a tracer. Data of the contents of U and Th and their isotopes 284U, 288U and 280Th, 282Th which are distributed along the cores, and the ratios of these isotopes284 U/238U and280 Th/282Th were obtained.
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【Co-citations】
Chinese Journal Full-text Database 8 Hits
1 Xia Ming Zhou Xiuyun(Institute of Geology, Academia Sinica) (Institute of Geochemistry, Academia Sinica);ALPHA-SPECTROMETRIC DETERMINATION OF URANIUM AND THORIUM IN GEOLOGICAL SAMPLES[J];Geochimica;1982-03
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【Secondary References】
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