By G. R. Blank, H. A. Heller (auth.), W. D. Ashby (eds.)
On may perhaps 15-18, 1961, the twelfth Annual Symposium on Spectros replica was once held in Chicago. Over the twelve-year heritage of this assembly, it has consistently grown and now ranks as one of many significant technical conferences within the box of spectroscopy. The scope of this system itself represents a stability among study purposes and regulate functions, among utilized and the extra primary elements of spectroscopy. Papers are provided every year within the area of expertise parts of X -ray, ultraviolet, obvious, infrared, Raman, EPR, and NMR spectroscopy. usually through the years, first-class paintings has been re ported at this symposium and no extra book used to be made. those reviews have been then basically misplaced for additional reference. it's the objective of this booklet to supply a resource of reference for the papers provided on the twelfth Annual Symposium. this primary try out at publishing a complaints doesn't comprise the complete software. a number of papers couldn't take delivery of corporation transparent ance for book, and a number of other extra have been meant for verbal presentation merely and have been by no means written for e-book. I, as Coordinator of the Symposium, want to show my gratitude to the Symposium Committee, John Ferraro, Elwin Davis, Joseph Ziomek, John Kapetan, L. S. grey, Jr., Russell J. Hansen, J. A. Sheinkop, L. V. Azaroff, and Carl Moore, whose diligence and exertions ended in a really tremendous symposium, and thus made pos sible this publication.
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Extra info for Developments in Applied Spectroscopy: Proceedings of the Twelfth Annual Symposium on Spectroscopy Held in Chicago, Illinois May 15–18, 1961
Example text
Transmission coefficients for ion-exchange membranes and papers. l9 of cobalt, 10 ml concentrated Hel per liter. B = 25-ml solution with 250 #9 of cobalt, 1()() ml concentrated Hel per liter. t Eberbock mechanical shaker setting, 55. tBased on chemical value for A-9. §Cobalt remaining in solution determined calorimetrically by A. Prokopovitsh, former chemist, Bureau of Mines, College Pork. from numerous textbooks on this subject and from various manufacturers, * some of which are listed below. The Permutit Company 50 West 44th Street New York 36, ~ew York H.
Some elements of particular interest to the geochemist are uranium, thorium, cerium, yttrium, zirconium, and lead; detection limits of 1 ppm are required for these elements. Accurate knowledge of their distribution provides valuable information on the cooling history of a magma. Van Wambeke [56J made a detailed evaluation of fluorescent X-ray spectrography for geochemical prospecting and appraisal of niobium-bearing carbonatites. Direct methods with no correction for matrix effects were used; the sensitivity found was 5 to 20 ppm for niobium at an accuracy of ±12%.
Principal impurity spectral lines are those of copper, nickel, and iron, plus the anode; the anode is either tungsten or molybdenum. Higher-purity tubes now available, either Machlett OEG-60 or Philips F A-60, have low iron, nickel, and copper intensities [40]. When the primary X-ray beam is scattered by the sample, Xrays lose energy (Compton effect) when shifting to a longer wavelength. This Compton scattering, which is more pronounced for samples comprised of low-atomic-number elements, results in broader or split primary spectral lines and thus increases the possibility of interference with analytical spectral lines.