Abstract
Sulphur is determined in iron alloys by evolution as hydrogen sulphide, followed by reaction with N,N-disaethyl- p-phenylenediamine and iron III to form methylene blue, which is measured spectrophotometricalty. Replicate results are reported for acid soluble metal samples containing 0.3–230 ppm of sulphur. An evaluation of the accuracy of the methylene blue procedure was made using radiotracer techniques.
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