Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
The Determination of Microgram Amount of Sulfur in Pig and Cast Iron with Pararosaniline
Hiroshi HARAJiro YAMADAKimio SUGIMOTOMasaru YAMAGUCHIHaruhisa IWAKIRI
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1970 Volume 56 Issue 2 Pages 360-365

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Abstract

A method which is rapid and highly sensitive is described for the determination of microgram quantities of sulfur in pig and cast irons.
The sample is burned at 1450°C in a stream of oxygen. The sulfur is converted-to sulfurdioxide, which is absorbed into 0.2 M Na2HgCl4 solution, and determined photometrically with P-rosaniline and formaldehyde at 560 Mil after 20 min standing.
Vanadium pentoxide is used as a combustion aid.
The limit of identification of sulfur in this method is 0.05 μg per ml.
Time for analysis is about 30 min.
The reproducibility of analytical results by the proposed method as coefficient of variation is 4.1% for carbon steel (0.011%S).

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© The Iron and Steel Institute of Japan
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