NEWS Charles Ν. Reilley, Dept. of Chemistry, University of North Carolina, Chapel Hill, N. C. 27514. 10:35 Current Distribution and Mass Transfer in Electro chemical Systems. John S. Newman, Dept. of Chemical Engineering, University of California, Berkeley, Calif. 94720. 11:15 The Effect of Fundamental Properties of Electrode Materials on Electrocatalysis. J . O'M. Bockrls, A. Damjanovic, R. J . Mannan, The Electrochemistry Lab., Uni versity of Pennsylvania, Philadelphia, Pa. 19104. Section C SYMPOSIUM ON NUCLEAR METHODS OF CHEMICAL ANALYSES (Joint with Division of Nuclear Chemistry and Technology) H. L. Finston, Presiding
11:30 The Radiometric Titration of Trace Amounts of Zinc. W. O. McSharry, M. Cefola, Fordham University, Bronx, N. Y.; A. R. Landgrebe, J . R. DeVoe, National Bureau of Standards, Gaithersburg, Md. 11:45 Determination of Sub-Microgram Amounts of Bro mine in Natural Silicates by Activation Analysis. W. D. Ehmann, Dept. of Chemistry, University of Kentucky, Lexington, Ky.; K. W. Lieberman, Dept. of Legal Medi cine, Harvard University Medical Center, Boston, Mass. Section D THE CHROMATOGRAPHY-PHYSICAL INTERFACE
CHEMISTRY
(in honor of J. Calvin Giddings, winner of the ACS Award in Chromatography and Electrophoresis) (Joint with Division of Physical Chemistry)
9:00 Helium-3 Activation Analysis: Simultaneous Meas urement of Oxygen-16 and Oxygen-18 Isotopes. Sam uel S. Markowitz, James F. Lamb, Diana M. Lee, Law rence Radiation Lab. and Dept. of Chemistry, University of California, Berkeley, Calif. 94720. 9:30 Precision Photometric Analysis in the Ultraviolet Using a Radioisotopic Light Source Photometer. H. H. Ross, Oak Ridge National Lab., P. 0 . Box X, Oak Ridge, Tenn. 37830. 10:00 Separation of Fission Products, Neutron Induced Ac tivities and Actinides in a Soil Matrix by Ion Exchange. Mark M. Zeligman, Fernando Bazan, Lawrence Radia tion Lab., P. 0 . Box 808, Livermore, Calif. 94550. 10:35 Radioisotopic Dilution for Trace Chemical Analysis. A. R. Landgrebe, J . R. DeVoe, L. T. McClendon, Nation al Bureau of Standards, Gaithersburg, Md. 10:55 Differential Controlled-Potential Coulometry Utiliz ing Radioisotopic Tracers. P. A. Pella, A. R. Landgrebe, J. R. DeVoe, National Bureau of Standards, Gaithersburg, Md. 11:15 Rapid Carrier-Free Method for the Radiochemical Determination of Cesium-137. J. J. McCown, E. J. Ellenburg, Westinghouse Electric Corp., Astonuclear Lab., P. O. Box 2028, Jackass Flats, Nev.
R. A. Keller, Presiding
9:15 Application of Nonequilibrium Theory to Gas Chroma tography. Paul D. Schettler, Dept. of Chemistry, Antioch College, Yellow Springs, Ohio; J . Calvin Giddings, Dept. of Chemistry, University of Utah, Salt Lake City, Utah 84112. 9:40 Interactions Responsible for the Selective Adsorp tion of Polar Molecules on Alumina. Comparisons of Ad sorption on Alumina and Silica. Lloyd R. Snyder, Union Research Center, Union Oil Co. of Calif., P. 0 . Box 76, Brea, Calif. 10:30 The Determination of the Free Gas Volume (V„) in Gas-Solid and Gas-Liquid Chromatographic Columns and Some Consequent Thermodynamic Measurements. Shigehiko Masakawa, Riki Kobayashi, James Alyea, Dept. of Chemical Engineering, Rice University, P. O. Box 1892, Houston, Texas 77001. 10:30 The Thermodynamic Study of Dilute Solutions in Liquid Crystalline Solvents by Means of Gas-Liquid Chromatography (GLC). Daniel E. Martire, Peter A. Blasco, Patrick F. Carone, Lawrence C. Chow, Henry T. Vicini, Dept. of Chemistry, Georgetown University, Wash ington, D. C.
Another Buchler Exclusive!
DENSITY GRADIENT SEDIMENTATION SYSTEMS Prepares and Dispenses 3 Gradients Simultaneously for a Complete Run in 10 to 15 Minutes! Now available, complete DGS systems.. .Chambers with single or triple outlets for preparation of linear gra dients and Piercing Units for removal of centrifuged layers. In 15 minutes or less, identical linear gradients can be produced for a complete run with the Buchler triple outlet mixing chamber and Polystaltic Pump. Re moval of centrifuged materials can be done in the lab by using Buchler's Piercing Units with cooling tray— eliminating the need to sit in a cold room. Various Piercing Units and single or triple mixing chambers are available for 5, 3 0 and 5 0 ml centrifuge tubes. Com ponents of the Density Gradient system are available as individual units. Write for technical bulletin # A C 2 - 5 0 0 0 A LABORATORY
APPARATUS·PRECISION
INSTRUMENTS
BUCHLER INSTRUMENTS, INC.
1 3 2 7 1 6 T HSTREET. BUSCHLER INSTRUMENTS I See ACS Laboratory Guide for All Products/Sales Office 58 A ·
ANALYTICAL CHEMISTRY
FORT
LEE.N E W JERSEY
07024
Circle No. 107 on Readers' Service Card