Abstract
A review of the methods for determining oxygen, hydrogen, nitrogen and carbon is presented. Recent developments in apparatus and techniques which have contributed materially to more precise and high speed analyses are discussed. Inert gas fusion is reviewed, together with recent advances that have contributed towards making this apparatus a very flexible and excellent control tool. Since a large number of metals require a bath or flux in which to alloy the sample, a critical review is presented of the platinum bath, platinum flux, and intermittent bath injection methods. Recommendations for further development are for methods which are capable of analysing high purity metals containing less than 10 ppm, and for methods where the amount of sample is limited. Also new methods or techniques should be investigated for the determination of nitrogen in metals, especially in the refractory metals and alloys.
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