Study for distribution and behavior of siderophile and chalcophile elements in the mantle.

我们研究了地幔中亲铁元素和球铁元素的分布和行为。为此，我们开发了：(1)测定铂族元素的新分析方法；(2)除铂族元素外的亲铁、亲硫和亲石元素的新分析方法；(3)用于Re-Os同位素体系的精确测定Re和Os同位素比值的新分析方法。在本研究中，我们设计了一种全新的消化容器，该容器廉价、简单，适用温度高达300℃。我们已经提出了专利申请。如果这项专利被接受，这将在世界各地使用，尽管这项专利是在日本刚刚提出的，因为缺乏资金。在日本专利局的回复中，我们对专利进行了回复和修改，并开发了新的测定方法，即BiTl，In，Li，Be，Rb，Sr，Y，Cs，Ba，La，Ce，Pr，Nd，Eu，Gd，Tb…的测定方法用Q极型电感耦合等离子体质谱(ICP-QMS)测定Dy、Ho、Er、Tm、Yb、Lu、Ph、Th和U。建立了同位素稀释内标法(ID-IS)。在这种方法中，当样品用Sm峰消化时，在不知道确切稀释系数的情况下进行元素分析。我们建立了假荧光方法，只需要0.1ml的样品溶液就可以测定这些元素。在此基础上，建立了扇形电感耦合等离子体质谱(ICPSFMS)同时测定Na、Mg、Al、P、Ca、V、Mn、Fe、Co、K、Sc、Ni、Cu、Zn、Ga的方法。这些方法被提交给地质标准和地质分析研究。此外，还建立了采用ID-IS和伪FI的电感耦合等离子体质谱(ICQMS)和电感耦合等离子体质谱(ICPSFMS)精确测定B、Ti、Zr、Nb、Mo、Sn、Sb、Hf和Ta的方法，并建立了多收集器电感耦合等离子体质谱(MC-ICPMS)分析Re和Os同位素的新方法。在本研究中，可以精确测量1Pg的Os和Re，这只能通过N-TIMS才能实现。这项研究已经接受了分析化学(正在出版)。不幸的是，分析技术的发展需要比我们预期的更长的时间，因此地幔样品的分析是未来的。虽然，我们已经开发了分析方法，但应用不会花费很长时间。较少

We have studied for distribution and behavior siderophile and chalcophle elements in the mantle. For this purpose, we have developed : (1)new analytical methods for determination of platinum group elements (PGEs) ; (2)the new analytical methods for siderophile, chalcophile and lithophile elements except for PGEs ; (3)the new analytical method for precise determination of Re and Os isotope ratios for application to Re-Os isotope systematics.We first developed the new sample digestion method for determination of PGEs. In this study, we have designed an utterly new digestion vessel, which is cheap, simple and applicable up to 300C. We have proposed the patent. If this patent is accepted, this will be used all over the world, although the patent was just proposed in Japan, because of the lack of money. There was a reply from the Japanese Patent Office, and we replied and modified the patent.We also developed the new determination method for Bi,Tl,In,Li,Be,Rb,Sr,Y,Cs,Ba,La,Ce,Pr,Nd,Eu,Gd,Tb … More ,Dy,Ho,Er,Tm,Yb,Lu,Pb,Th and U using Q-pole type ICP-MS (ICP-QMS). We developed isotope-dilution internal standardization method (ID-IS). In this method, when the sample is digested with Sm spike, then, the elemental analysis is performed without knowing the exact dilution factor. We developed pseudo-FI method, in which only 0.1mL of sample solution is required for determination of these elements. Furthermore, we developed the determination method for Na,Mg,Al,P,Ca,V,Mn,Fe,Co,K,Sc,Ni,Cu,Zn and Ga using the same sample solution by sector type ICP-MS (ICP-SFMS). These methods are submitted to Geostandards and Geoanalytical Research. In addition, precise determination methods for B,Ti,Zr,Nb,Mo,Sn,Sb,Hf and Ta using ID-IS and pseudo-FI methods by ICP-QMS and ICP-SFMS were developed and submitted.We also developed new analytical methods for Re and Os isotope analysis using multiple collector ICP-MS (MC-ICP-MS). In this study, Os and Re of <1pg can be measured precisely, which can only be achieved by N-TIMS. This study has been accepted Analytical Chemistry (in press).Unfortunately, the development of analytical technique required far longer time than we had expected, thus the analysis of mantle samples are in future. Although, we have developed analytical methods, application will not take long time to accomplish. Less