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NEWS alyses. T h e m e t h o d involves reducing the radioisotope polarographically t o the zero oxidation state a n d amalga mating with t h e m e r c u r y drop. T h e d r o p is removed from t h e solution and radioactivity measured b y s t a n d a r d counting techniques. I n addition to analytical applications, other possible uses include electro chemical studies, in situ analysis of highly radioactive solution, p r e p a r a tion of carrier-free radioactive sources, analyses of short-lived nuclides, a n d determination of radiochemical yields. N e w methods for analysis of high energy fuels, such as rocket propellants, were outlined b y G. C. Whitnack, U . S. N a v a l Ordnance T e s t Station. Polarographic procedures have been devel oped for determination of b o t h organic
Extreme Heat Resistance
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Full-Range Radiant Energy Transmission
VITREOSIL fused quartz prod ucts can be supplied in an un usually large variety of types and sizes. Also fabricated to specification to meet semi-con ductor requirements.
TRANSPARENT VITREOSIL For u l t r a - v i o l e t a p p l i c a t i o n s , metallurgical investigations and processes, chemical research and analysis, photochemistry, spec troscopy and physical, optical and electrical research and pro duction operations. Send specifi cations for your requirements. Please use coupon below. See our ad in Chemical Engineering Catalog
THERMAL AMERICAN FUSED QUARTZ CO., INC. 18-20 Salem Street, Dover, N e w Jersey
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ANALYTICAL CHEMISTRY
Radiochemical Analysis T h e three-day symposium on radio chemical analysis covered fission prod uct analysis, counting methods a n d techniques, nondestructive analysis and gamma spectrometry, general proce dures, a n d applications. Determination of fallout material from nuclear detonations on land a n d in the sea was described in two papers. G. A. Welford, IT. S. Atomic Energy Commission, described a system for offsite measurement of fallout material. T h e system, which is relatively simple,
ANALYSTS CALENDAR
Absolute Chemical Purity '
and inorganic constituents of doublebase and single-base powders and plas tic materials used in solid a n d liquid propellants.
May 30 to June6
Fifth World Petroleum Congress and Exposition, New York Coli seum, New York City, N . Y. Contact: C. E. Davis, General Secretary, Fifth World Petroleum Congress, Inc., 527 Madison Ave., New York 22, Ν . Υ.
June 2 to 6
ASTM Committee E-14, Sixth Meeting on Mass Spectrometry, Jung Hotel, New Orleans, La. Contact: R. A. Friedel or A. G. Sharkey, Jr., U. S. Bureau of Mines, 4800 Forbes St., Pittsburgh 13, Pa. See page 46A.
June 9 to 11
Ninth Annual Symposium on Spectroscopy, Pick-Congress Hotel, Chicago, 111. Contact: Henry J. Hettel, Armour Research Founda tion, 10 West 35th St., Chicago 16, 111. Sec page 43 A, D e c ; page 34 A, May.
June 16 to 20
Symposium on Molecular Structure and Spectroscopy, Department of Physics and Astronomy, The Ohio State University, Columbus, Ohio. Contact: Harold H . Nielsen, Dept. of Physics and Astron omy, The Ohio State University, Columbus 10, Ohio. See page 30 A, May.
June 19 to 21
Division of Analytical Chemistry, ACS, annual summer symposium, "Analytical Chemistry of Fused Solids," General Electric Research Laboratory, T h e Knolls, Schenectady, N . Y. Contact: Ε. Κ. Bacon, Dept. of Chemistry, Union College, Schenectady 8, Ν . Υ. See page .46 A, March; page 26 A, May.
June 23 to 27
American Society for Testing Materials, annual meeting, Hotel Statler, Boston, Mass. Contact: Fred F . Van Atta, Assistant Secretary, 1916 Race St., Philadelphia 3, P a .
Aug. 13 to 15—Seventh Annual Conference on Industrial Application of X-Ray Analysis, Denver Research Institute. University of Denver, Albany Hotel, Denver, Colo. Aug. 20 to 27—Society for Analytical Chemistry, Symposium on Microchemistry, Birmingham, England. Sept. 1 to 13—Second International Congress on Peaceful Uses of Atomic Energy, Geneva, Switzerland. Sept. 4 to 6—Electron Microscope Society of America, annual meeting, Miramar Hotel, Los Angeles, Calif. Sept. 7 to 12—American Chemical Society, 134th National Meeting, Chicago, 111. Sept. 7 to 20—XXXI Congrès International de Chimie Industrielle, Liège and Brussels, Belgium. Sept. 9 to 12—ACS Chicago Section, Tenth National Chemical Exposition, International Amphitheatre, Chicago, 111. Sept. 15 to 17—Canadian Association for Applied Spectroscopy, Fifth Ottawa Symposium on Applied Spectroscopy, Ottawa, Canada. Sept. 15 to 19—Instrument Society of America, thirteenth annual instrument automation conference and exhibit, Philadelphia, Pa. Sept. 24 to 26—ASTM Committee E-14 and Institute of Petroleum, Mass Spectrometry Panel, Hydrocarbon Research Group, joint meeting, London, England. Sept. 29 to Oct. 1—Second Conference on Analytical Chemistry in Nuclear Reactor Technology, Oak Ridge National Laboratory, Gatlinburg, Tenn. Oct. 20 to 22—American Oil Chemists Society, fall meeting, Hotel Sherman, Chicago, 111. April 5 to 10, 1959—American Chemical Society, 135th National Meeting, Boston, Mass. Sept. 13 to 18, 1959—American Chemical Society, 136th National Meeting, Atlantic City, N. J. f, . COming
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