Further Investigation on the Determination of Sulfur in Steel by Reflectance Photometry with Hydrogen Sulfide Detecting Tape

• Published in: Analytical Sciences Vol. 10; no. 4; pp. 667 - 668
• Main Authors: TANAKA, Tatsuhiko, TATEO, Eiji, MIZUIKE, Atsushi, HAYAKAWA, Yasuhiro, ONO, Akihiro, SAEKI, Masao
• Format: Journal Article
• Language: English
• Published: Tokyo The Japan Society for Analytical Chemistry 01-08-1994; Japan Society for Analytical Chemistry; Japan Science and Technology Agency
• Subjects: Analytical chemistry; Applied sciences; Chemistry; Exact sciences and technology; hydrogen sulfide detecting tape; Metals. Metallurgy; reflectance photometry; Spectrometric and optical methods; steel; Sulfur; Trace analysis; Chemical analysis; Hydrogen Sulfides; Steel; Sulfur; Certified reference material; Gas detector; Photometry; Reflectance
• DOI: 10.2116/analsci.10.667
• EISSN: 1348-2246
• ISSN: 0910-6340

A simple and rapid method for the determination of sulfur in steel, which consisted of sample decomposition in boiling 4 M hydrochloric acid, a reaction of the evolved H sulfide with a lead (II) acetate-impregnated paper tape and a reflectance measurement of the tape coloration was reported earlier. Although the method proved to be applicable to the determination of 3-10 mu g of S, a problem remained unsolved. The analytical values obtained by using a calibration curve prepared with continuous flows of standard H sulfide gases (diluted with nitrogen) were appreciably higher than those obtained by using a calibration curve prepared with standard-steel samples. Accordingly, a further investigation has been carried out to clarify this discrepancy and, thus, to establish a more reliable analytical procedure.