Although there appeared a number of reports on the determination of total sulphur in iron and steel, the most rapid, simple and reliable method is probably the so-called direct combustion-gravimetric method investigated recently by Kar with the extra precautions to prevent the loss of sulphur trioxide produced during the combustion.
In the field of the direct combustion method, however, the titration process seems more recommendable to the steel works' analysis than the gravimetric one, and of all the method based on the titration, the method proposed by Vita can be pointed out as the most interesting one, though it does not seem to be widely adopted as yet. According to the present author's experience, the results obtained by the latter method were usually undesirably high.
In this paper, the present author called the attention of the effect of CO2 formed during the combustion of samples, on the decomposition of KIO3+KI mixed reagent and pointed out that the method of Vita should, therefore, be applicable as one of the most accurate methods for the work's analytical purposes provided that the carbon blank is introduced.
Applying the analytical method proposed by the author to the estimation of total sulphur for 17 kinds of iron and steel, the excellent results were obtained.