Browsing Radiocarbon, Volume 35, Number 3 (1993) by Authors
An Improved Method for Radiocarbon Dating Fossil BonesArslanov, Kh A.; Svezhentsev, Yu S. (Department of Geosciences, The University of Arizona, 1993-01-01)We demonstrate here that the use of either the acid-alkali or Longin method alone does not fully extract contaminants from bone-collagen fractions. We present our methods and results of extracting bone collagen that involve successive use of both of these methods.
Late Pleistocene Geochronology of European RussiaArslanov, Kh A. (Department of Geosciences, The University of Arizona, 1993-01-01)I constructed a Late Pleistocene geochronological scale for European Russia employing 14C dating and paleobotanical studies of several reference sections.
Problems and Methods of Dating Low-Activity Samples by Liquid Scintillation CountingArslanov, Kh A.; Tertychnaya, T. V.; Chernov, S. B. (Department of Geosciences, The University of Arizona, 1993-01-01)The important problem of contamination of old samples by younger 14C necessitates treatment of organic and carbonate samples to ensure more complete removal of contaminating carbon. Here we present studies of chemical procedures for the liquid scintillation method of 14C dating undertaken since 1960 in the former USSR. We discuss new procedures such as lithium carbide synthesis from charred organic samples and benzene synthesis on a V2O5.Al2O3.SiO2 catalyst, as well as memory effect in the carbide synthesis procedure and characteristics of two homemade counters.