Developments in Applied Spectroscopy: Proceedings of the by G. R. Blank, H. A. Heller (auth.), W. D. Ashby (eds.)

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By G. R. Blank, H. A. Heller (auth.), W. D. Ashby (eds.)

On might 15-18, 1961, the twelfth Annual Symposium on Spectros­ reproduction was once held in Chicago. Over the twelve-year heritage of this assembly, it has regularly 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 purposes, among utilized and the extra basic elements of spectroscopy. Papers are provided every year within the strong point components of X -ray, ultraviolet, seen, infrared, Raman, EPR, and NMR spectroscopy. normally through the years, very good paintings has been re­ ported at this symposium and no additional booklet was once made. those stories have been then basically misplaced for additional reference. it's the function of this e-book to supply a resource of reference for the papers offered on the twelfth Annual Symposium. this primary try at publishing a complaints doesn't comprise the full software. numerous papers couldn't receive corporation transparent­ ance for book, and a number of other extra have been meant for verbal presentation basically and have been by no means written for e-book. I, as Coordinator of the Symposium, want to convey 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 hard work ended in a very tremendous symposium, and for this reason 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

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Lambert [42] stated that the minimum measurable amount of uranium or plutonium in aluminum was 500 ppm_ For plutonium the sample was sandwiched between two l/rmil Mylar sheets to prevent contamination of the sample chamber. These limits seem high since aluminum is not a strong X-ray absorber for radiation in the I-A range. Fluorescent X-ray Spectrography 43 Oxides In many instances it may be necessary to convert metal samples of irregular shapes or sizes to oxides before analysis. The intensity of a metal Ka line should be approximately the same whether measured on a pure metal or its oxide, assuming an infinite thickness of sample.

Absorption of Zn Ka by cobalt. added to the solution was then washed, dried, and subjected to X-ray analysis. The standard deviation for starting samples of 1 g was ±10% at 5 to 6 ppm. Campbell, Leon, and Thatcher [16] determined microgram quantities of iron and copper in low-grade copper ores, using cationexchange membranes. Results obtained by this method and by chemical techniques agreed. Zemany, Welbon, and Gaines [60] determined the quantity of potassium liberated from the surface of ground-mica samples by ionexchange-membrane techniques.

However, Sandell [51 J states, "There is no reason for making this boundary a rigid one. It is sometimes convenient to consider as a trace constituent one that occurs to the extent of a few hundredths of a percent. 05% (500 ppm) is emphasized. SAMPLE CLASSIFICATION Liebhafsky, Pfeiffer, Winslow, and Zemany [44J suggest that trace analysis can be conveniently subdivided according to sample type: (1) traces as minor constituents in samples not unusually small and (2) traces as major constituents of a minute sample.

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