title: An anion-exchange chromatographic study on boron isotopic fractionation at 2 MPa at 293 K.
abstract: 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.
authors.affiliation: Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba,Tokyo 153-8902, Japan. musashi@esa.c.u-tokyo.ac.jp
authors.forename: Masaaki
authors.initials: M
authors.lastname: Musashi
authors.forename: Motoyuki
authors.initials: M
authors.lastname: Matsuo
authors.forename: Takao
authors.initials: T
authors.lastname: Oi
authors.forename: Masao
authors.initials: M
authors.lastname: Nomura
mesh_terms: D000837:Anion Exchange Resins / Q000737:chemistry*; D001274:Atmospheric Pressure; D001895:Boron / Q000032:analysis / Q000737:chemistry*; D005591:Chemical Fractionation; D002852:Chromatography, Ion Exchange / Q000379:methods*; D007554:Isotopes / Q000032:analysis / Q000737:chemistry
chemical_list: D000837:Anion Exchange Resins; D007554:Isotopes; D001895:Boron