Musashi Masaaki, Matsuo Motoyuki, Oi Takao, Nomura Masao
Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba,Tokyo 153-8902, Japan.
J Chromatogr A. 2006 Oct 27;1131(1-2):97-102. doi: 10.1016/j.chroma.2006.07.031. Epub 2006 Aug 7.
To study boron isotopic fractionation at high pressure, column chromatography operated in the breakthrough manner was performed at 2.0 MPa at 25.0 degrees C. The fractionation factor (S) between boron adsorbed onto strongly basic anion-exchange resin and boron in solution was obtained as 1.013, which was smaller than the values at 0.1 MPa (atmospheric pressure) found in literature. The pressure dependence of S was discussed based on the polymerization of boron in the solution and resin phases and on the occurrence of the pressure dependent isotope effect relating to the molar volume changes of boron species upon isotope substitution.
为了研究高压下的硼同位素分馏，在25.0摄氏度、2.0兆帕的条件下，采用穿透模式进行柱色谱分析。得到吸附在强碱性阴离子交换树脂上的硼与溶液中硼之间的分馏系数（S）为1.013，该值小于文献中报道的0.1兆帕（大气压）下的值。基于硼在溶液相和树脂相中的聚合作用以及与同位素取代时硼物种摩尔体积变化相关的压力依赖性同位素效应的出现，对S的压力依赖性进行了讨论。
