Stepwise Fluorination Method for Determination of Oxygen Isotopic Ratio of Diatoms
文献类型：期刊论文
| 作者 | Li Tie-Jun; Li Hong-Wei; Liu Xiu-Jin; Feng Lian-Jun |
| 刊名 | CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
 |
| 出版日期 | 2012-12-01 |
| 卷号 | 40期号:12页码:1897-1901 |
| 关键词 | Isoope ratio Diatom Stepwise fluorination delta O-18 value |
| ISSN号 | 0253-3820 |
| DOI | 10.3724/SP.J.1096.2012.20497 |
| 文献子类 | Article |
| 英文摘要 | Determination of the delta O-18 value of diatom can obtain the initial information of its oxygen isotopic composition, and also has favorable application prospects in paleoenvironment, paleontology, petroleum exploration and environmental prediction. We carried out eight-step fluorination experiments with BrF5 reagent on diatom samples and quartz standard to reveal variation of oxygen isotopic composition in different steps. The eight-step fluorination determined the proportion of surface oxygen to be 25%-28%. The delta O-18 values obtained from the above processes were all around (35. 34 +/- 0. 15)parts per thousand. Then we simplified the eight-step fluorination to two-step fluorination. First, we removed the surface oxygen of specific sedimentary diatoms, and then totally fluoridated the samples. The difference of delta O-18 values from eight-step and two-step fluorination experiments on the same samples was only 0. 3 parts per thousand. The accuracy of measurement has reached or preceded the repeated measurement error of +/- 0. 5 parts per thousand in the international studies. On the basis of many conditional experiments, the stepwise fluorination methods on the diatoms were established. For diatom samples with weight of a mg, the 0.392 aK mL (K=0. 18) BrF5 were loaded in the first step, and heated to 550 degrees C for 1 h; and then five times of theoretical quantity of BrF5 were loaded in the second step after the system regain vacuum, and heated to 550 degrees C for 3 h. The released oxygen were converted to CO2, and then analysed by MAT-252 to obtain delta O-18 value of diatom samples. |
| WOS关键词 | SOUTHERN-OCEAN ; SILICA |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000317237500012 |
| 出版者 | ELSEVIER SCIENCE INC |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84582]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Li Tie-Jun |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li Tie-Jun,Li Hong-Wei,Liu Xiu-Jin,et al. Stepwise Fluorination Method for Determination of Oxygen Isotopic Ratio of Diatoms[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,2012,40(12):1897-1901. |
| APA | Li Tie-Jun,Li Hong-Wei,Liu Xiu-Jin,&Feng Lian-Jun.(2012).Stepwise Fluorination Method for Determination of Oxygen Isotopic Ratio of Diatoms.CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,40(12),1897-1901. |
| MLA | Li Tie-Jun,et al."Stepwise Fluorination Method for Determination of Oxygen Isotopic Ratio of Diatoms".CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 40.12(2012):1897-1901. |
入库方式： OAI收割
来源：地质与地球物理研究所
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