REINHOID
Chromato graphic Methods By R. Stock and C. B. F. Rice
NEW BOOKS This second section of Monograph 25 is the twelfth in a series entitled " S t a n d a r d X - r a y Diffraction P a t t e r n s . " This publication presents 37 standard x-ray diffraction powder patterns. Eleven of these are to replace patterns already given in the X - r a y Powder D a t a File, and 26 are for the substances not previously included. T h e X - r a y Powder D a t a File is a compilation of diffraction p a t t e r n s from m a n y sources and is used for the identification of unknown crystalline materials. The National Bureau of Standard patterns are made with a Geiger counter x-ray diffractometer using materials of high purity.
1963, Approx. 250 pages, $10.00 W I T H EMPHASIS on paper and
gas
chromatography, because these methods are now the most impor tant, this well-organized book serves as an introduction and accounting of techniques currently in use. The treatment is primarily dictated by practical considerations, and is de signed to show how the various methods complement each other. In addition to this wealth of practical detail is the extensive knowledge which reflects the authors' personal experience over a long period of time. One important and invaluable feature is the inclusion of a group of single experiments covering the whole range of methods described, especially students' experiments in gas chromatography which is re garded as an important develop ment. Zone electrophoresis, while not strictly speaking a chromatographic! technique, is nearly enough related to be included. The reader can find guidance as to the choice of method l'or a particular purpose, and to as sess the relative value of the differ ent procedures. A book valuable to teachers in schools, technical colleges and uni versities, to final year undergradu ates, and to analytical and industrial chemists and biochemists who want an introduction to chromatography.
30 Days' Examination Offer REINHOLD BOOK DIVISION, Dept. M-180 430 Park Avenue, New York, Ν. Υ. 10022
Please send me eopy(ies) of Stock & Rice: Chromatographic Meth ods, at $10.00 for 30 days' examination under the following terms: π Total payment enclosed (Reinhold pays regular delivery charges) • hiill me (plus d e l i v e r y charges) Print Name Address
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ANALYTICAL CHEMISTRY
The following can be obtained from the Office of Technical Services, U. iS. Dept. of Commerce, Washington, I). C.
Automatic Mass Spectrometer Monitoring Uranium Isotope centrations. A. Langdon et al. ion Carbide Nuclear Co. for the Atomic Energy Commission. uary 1963. 17 pages. Order Κ •if) cents.
for Con Un U. S. Jan 144,5.
Two instruments were designed. E a c h instrument is fully automatic and capable of making a uranium isotope determination every two and one half minutes. T h e results are recorded di rectly in weight per cent TÎ23"'. These low-cost monitoring spectrometers were operated reliably for more than seven years.
D e v e l o p m e n t of Krypton-85 as versal Tracer. I). Chleck Parametrics, Inc., for the Atomic Energy Commission. 1962. 126 pages. Order 9720. $2.50.
a Uniet al. U. S. March NYO
Krypton-S5 is used for corrosion and wear, and chemical aging studies. Two methods are given for incorporating krypton-85 into a variety of solid m a terials. In the first method the k r y p t o n is ionized and then impelled into the solid under the influence of a potential drop. In the second method, the solid is placed in contact with the gas at high t e m p e r a t u r e and pressure; diffusion of the gas into the solid takes place. The surface location of the radioisotope combined with the t e m p e r a t u r e dependent loss makes possible t h e measurem e n t of surface and interfacial temperatures.
The Effects of Ion Hydration in Solvent Extraction and Ion Exchange. D. C. Whitney. Lawrence Radiation Laboratory for the U. S. Atomic Energy Commission. October 1962. 186 pages. Order UCRL 10506. $2.70. The experimental d a t a given in this report deal with processes involving the transfer of either ions or dipolar molecules from an aqueous phase to one t hat is less aqueous in t e r m s of its physical and chemical properties, within a system where t h e two phases are readily distinguishable. T h e following factors were found to be i m p o r t a n t in these processes : water-water, ion-water, and ion-ion interactions in the aqueous and resin phases, and dipole-water, dipole-ion, and dipole-dipole interactions in the organic solvents phase. This work is aimed at developing a comprehensive theory of ion exchange and solvent extraction.
Evaluation of Diethers a s Uranium Extractants. J. M. Googin. Union Carbide Nuclear Co. for the U. S. Atomic Energy Commission. January 1963. 28 pages. Order Y-llfiS. 75 cents. T h e three dialkoxypentanes, 1,5-dimethoxypentane, 1,5-diethoxypentane, and l-ethoxy-5-ethoxypentane, can be used for uranium extraction from impure solutions. T h e highest uranium distribution coefficient is found with 1,5-dimethoxypentane, while the lowest is found with 1,5-diethoxypentane. The extraction power on an ether is shown to be a function of its carbon-to-oxygen ratio and its dipole moment.
Thermal Analysis and Gradient Quenching Apparatus and Techniques for the Investigation of Fused Salt Phase Equilibria. H. A. Friedman, et al. Union Carbide Corp. for the U. S. Atomic Energy Commission. 32 pages. Order ORNL 3373. 75 cents. A p p a r a t u s and methods were devised for determination of high temperature equilibrium phase relationships in condensed systems of molten salts. E m phasis is given experimental techniques required for investigation of nonvolatile hydroscopic fluorides. Measurements are made of t h e thermal effects occurring on melting and freezing polycomponent mixtures, and others in which unequivocal identification of solid phases formed during crystallization is obtained.
