Abstract
Oxygen in various materials can be determined by rapid, non-destructive fast-neutron activation analysis with a small neutron generator. The applicability of the method for determination of alumina in aluminum electrolytic baths, which is a very important factor in efficient aluminum metal production, has been studied. One of the major problems associated with this method is the interference of fluorine from cryolite. This difficulty has been eliminated by using a functional relation of the 16N/ 18F activity ratio and the oxygen/fluorine ratio in the sample. The alumina content in baths can be determined with a precision of 10–15% to 15–20% for 10–5% alumina concentrations.
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