NEWS consists of a furnace, ion exchange column, and leveling device constructed of polyethylene. The column is packed with paper pulp and ion exchange resins. The units are exposed for a month and shipped to a central labora tory for analysis. Results are comparable to other systems in use but have the advantage that untrained persons can operate them as no laboratory procedures are required prior to shipping the sample. Several interesting radiochemical ap plications were reported. The moni toring of nonradiological gases by a radiological analyzer was described by C. A. Ziegler, of Tracerlab. In this method nonradioactive gases are passed through a radiochemical reactor bed where they undergo a gas exchange re action. The radioactive effluent gas is measured by standard counting tech niques. Advantages are accuracy of tracer techniques without the need of tagging the material to be measured. The system is applicable to continuous flow or batch analysis and even to battery operation for field use. Several papers relating to applica tions of the characteristic x-rays ex cited by beta particle bombardment were presented. This work was done by R. H. Miiller, D. C. Millier, F. D. Lonadier, and R. W. White of Los Alamos Scientific Laboratory. Scintil lation spectrometry using a strontium-90-yttrium-90 source allows posi tive identification of a wide range of elements. Present limitations restrict identification to elements above bro mine. Targets used can be in the form of films, thick metal disks, powders molded in a plastic binder, deposits on combined-spot filter paper disks, or solutions in plastic cups. A related development presented by D. G. Gardner, Westinghouse Electric Corp., concerns a specially designed plastic detector which emploj^s a hollow construction to minimize electron scattering. In beta-ray spectroscopy, he said, there is an improvement in re-solution over the conventional flattype detector. Other advantages are: operation in air atmosphere, small quantities of activity needed, good re solving time, simplicity of operation, and low cost. Fallout fission products in the ocean promise to be a new tool for measuring horizontal and vertical ocean circula tion times, T. T. Sugihara, Clark Uni versity, said. Since the chemical nature of the fission product can affect its distribution, several nuclides are studied. Strontium-90 and cesium-137 ions in sea water, for example, should show a roughly constant ratio of con-
New | Quantovac | adds C, S, & Ρ to metallic elements for complete high-speed analysis of steel & cast irons Grating b l a z e d f a r 1800A
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EMI multiplier phototubes ι
Arc-spark chamber
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flushed w i t h argon IP28 multiplier phototubes
ARL introduces the first large vacuum spectrometer to extend range of direct-reading spectrochemical analysis into far ultraviolet The iron and steel industry has an important new high-speed analytical tool. F o r the first time, carbon, sulfur and phos phorus can be analyzed simul taneously with all the metallic elements in a few minutes. These nonmetallic elements no longer require expensive, sepa rate analysis.Now.this one high speed, d i r e c t - r e a d i n g i n s t r u ment will do the complete job. By means of an evacuated spectrometer and argon-flushed arc-spark chamber, the Quantovac extends the spectrum range
into the far ultraviolet. It thus provides the most sensitive arc lines of C, S, P, As, and Se for spectrochemical analyses, be sides t h e usual lines of t h e metallic elements. In fact, as many as 24 elements may be analyzed simultaneously in the 1600-3300A r a n g e with the Quantovac. The Quantovac will provide high-speed furnace control. It will save time and labor. Please write for full information. Your inquiry will be answered fully and promptly. * T R A D E MARK
APPLIED RESEARCH L A B O R A T O R I E S , I N C . subsidiary of BAUSCH & LOMB OPTICAL CO. P . O . B O X 1710, G L E N D A L E 5, C A L I F O R N I A BRANCH OFFICES
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NEW YORK
* PITTSBURGH • DETROIT « CHICAGO LAUSANNE, Switzerland · LONDON, England
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HOUSTON
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IOS ANGELES
For further information, circle number 41 A on Readers' Service Card, page 89 A VOL.
3 0 , N O . 6 , JUNE
1958
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41
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