Enrichment of germanium-73 with the magnetic isotope effect

Abstract

-(0.1 i 1.0) +( 12.3 2.0) O b(zGe) = ((ZGe/74Ge)/(ZGe/74Ge)0) - 1. 2) X le3 and 8.0 X le2 mol dm-3, respectively. The irradiation of the sample was carried out with a 500-W deep UV lamp. The details of the sample preparation and photolysis are described in the previous paper.7 For germanium isotope analysis after photolysis, the reaction products and starting compound (Ph3- MeGe) should be isolated from the micellar solution, but this isolation was very difficult. We isolated the products and starting compound by using a JAI-LC908 recycle high-performance liquid chromatograph (HPLC) with a gel permeation chromatography (GPC) column. The isotope ratios were measured using a VG- ELEMENT PQ-s2 inductively coupled plasma mass spectrometer (ICP-MS). Although the relative standard deviation (RSD) of the observed isotope ratio was <0.3% in the specifications of the commercially available ICP-MS, it was not so easy to realize this RSD value.