New From General Atomic
ULTRA-SENSITIVE TRACE ELEMENT DETERMINATIONS by Neutron Activation Analysis General Atomic Division of General Dynamics now offers to industry and research institutions an Activation Analysis Service for determining trace elements in the parts-per-million and parts-per-billion range. The ultrasensitivity of Activation Analysis makes possible the routine determination of certain trace elements, and gives extreme accuracy in the analysis of many others. And its simplicity can save time and money. Advantages include freedom from reagent contamination, small sample size, and in many cases, non-destruction of samples. In activation analysis, a sample is placed in one of General Atomic's TRIGA reactors and bombarded with neutrons converting some elements in the sample to unstable radioactive forms. The characteristic radiations emitted are then analyzed electronically for qualitative and quantitative determinations of these elements.
What Can Activation Analysis Do for You? Wherever measurements of minute concentrations of elements in samples are required, activation analysis does the job — accurately, quickly and economically. Even at higher levels of concentration, activation anal-
Typical Applications of Activation Analysis Material
Minimum Detectable Quantity* (PPM) Petroleum V 0.005 Hydrocarbons As 0.005 Na 0.02 CI 0.2 Au 0.005 Vegetable & CI 0.2 Citrus Oils Br 0.02 Cu 0.01 Mn 0.001 Na 0.02 AI 0.1 Sn 10. Semiconductors Sb 0.02 Au 0.005 As 0.01 Cu 0.1 Ga 0.1 Plastics CI 0.05 Br 0.02 Cu 0.05 Zn 10. Cd 40. Na 0.01 Ti 0.5 Butterfat CI 0.2 • Limits shown represent routine experience at General Atomic employing totally instrumental methods. Ultimate limits of detection for the pure elements are considerably lower.
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ysis is often the best method. Activation analysis' many applications include: analyzing petroleum hydrocarbons for vanadium, arsenic and chlorine to protect refinery process catalysts; detecting pesticide residues, such as bromine and chlorine; and improving semiconductor performance through greater control of the amounts of antimony, gold and other elements they contain.
General Atomic Services With one of the largest full-time staffs of radiochemists in industry, the Activation Analysis Service can process large numbers of samples quickly and with unprecedented sensitivity. For a technical bulletin and information about General Atomic's $50 Exploratory Study Offer, write: Activation Analysis Service, Dept. 130, General Atomic Division, General Dynamics, R O. Box 608, San Diego 12, Calif.
Visit us at Booth 102, Pittsburgh Analytical Conference
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