The use of arsenazo(111) in the determination of total sulphur in coal by the oxygen-flask method: M38-8/111E-PDF

"The oxygen-flask method for determining sulphur in organic compounds has been used for several years. It has also been applied to the determination of total sulphur in coals by the B.C.R.A. and by D.B. Ratcliffe and A.T.S. Cunningham using Thorin as titration indicator. Despite the simplicity of the apparatus and technique, the method has not been widely adopted for coals partly because it has lacked an indicator displaying a sharp colour contrast at the end-point, thus restricting its use to experienced analysts. Recently S.B. Savvin et al, and K. Hozumi and K. Umemoto have pointed out that a new indicator Arsenazo(III) gives a much more definite end-point than Thorin when used in analysing essentially pure organic compounds for sulphur content. Moreover the end-point is a reversible one"--p. 217.

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Department/Agency Natural Resources Canada. Dept. of Energy, Mines and Resources. Mines Branch.
Title The use of arsenazo(111) in the determination of total sulphur in coal by the oxygen-flask method
Series Title Reprint series ;
Publication Type Series - View Master Record
Language [English]
Format Electronic
Electronic Document

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Note Cover title. "Reprinted from the Fuel - the Journal of Fuel Science, vol. 48, 1969, no. 2, pps 217-219." Historical publication digitized from print 2017 [by Natural Resources Canada].
Date 1972.
Number of Pages p. 217-219
Catalogue Number
  • M38-8/111E-PDF
Departmental Catalogue Number 300190
Subject Terms Coal, Testing