Zinc Isotope Effects in Benzo Crown Resin by Displacement Chromatography

Abstract

The isotope effects of zinc were studied by displacement chromatography with a polymer-supported benzo crown resin packed in glass columns. The influence of migration distance on the zinc isotope effect was investigated. Migration distances from one to thirty meters were performed by feeding zinc chloride in dehydrated acetone solvent into the columns. The migration distance was proved to have no effect on the separation coefficient ("); however, the migration distance clearly affected the slope coefficient (k s ). The height equivalent to a theoretical plate (HETP) was variable for each migration distance in the present work. The slope coefficient k s and HETP were 0.035 and 0.29 cm, respectively, at the 30 m chromatographic operation under 298 AE 1 K in the present work.

Study on the Isotope fractionation of Zinc in Complexation with Macrocyclic Polyethers

“…[2] A similar experiment has been performed on zinc isotope enrichment in which a possible isotope fractionation was found. [3] This study was expanded to liquid membrane [4] and liquid chromatographic systems [5][6][7] for seeking a better preparation of 64 Zn-depleted materials. There is an impetus for this as the radionuclide 65 Zn generated via neutron capture reaction of 64 Zn is a strong gamma-ray emitter, and therefore the use of Zn materials including 64 Zn at neutron fields is limited.Historically, there has been added difficulty in terms of analytical techniques as well as in studying isotope fractionation of zinc, which can be limited due to uncertainties of isotopic analysisby employing thermal ionization mass spectrometry(TIMS), [4] or inductively coupled plasma quadrupole mass spectrometry(ICP-QMS).…”

“…There is an impetus for this as the radionuclide 65 Zn generated via neutron capture reaction of 64 Zn is a strong gamma-ray emitter, and therefore the use of Zn materials including 64 Zn at neutron fields is limited.Historically, there has been added difficulty in terms of analytical techniques as well as in studying isotope fractionation of zinc, which can be limited due to uncertainties of isotopic analysisby employing thermal ionization mass spectrometry(TIMS), [4] or inductively coupled plasma quadrupole mass spectrometry(ICP-QMS). [3,7] This difficulty has more recently been overcome by employing multi collector (MC)-ICP-MS [5,6,8] . Previously, using MC-ICP-MS,the Zn isotope fractionation in a ZnCl 2 /crown ether system has been determined.…”