Abstract
The sample is decomposed with boiling 4 M hydrochloric acid to convert sulfur into hydrogen sulfide, which is then transferred with a nitrogen stream to a continuously moving paper tape impregnated with lead(II) acetate. The resulting lead(II) sulfide on the tape is then measured by reflectance photometry at 555 nm. The amount of sulfur (3–10 μg) in steel can be determined with a relative standard deviation of less than 3% (n=3 to 7) within 10 min.
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References
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Tanaka, T., Kawahara, K., Tateo, E. et al. Simple and Rapid Determination of Sulfur in Steel by Reflectance Photometry with a Hydrogen Sulfide Detecting Tape. ANAL. SCI. 8, 627–630 (1992). https://doi.org/10.2116/analsci.8.627
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DOI: https://doi.org/10.2116/analsci.8.627