00000nam 2200000za 4500 9.840845 CaOODSP 20221107151937 cr ||||||||||| 170801s1972 onc ob f000 0 eng d CaOODSP eng n-cn--- M38-8/111E-PDF M38-8/111 Ahmed, S. M. (Syed M.), 1943- The use of arsenazo(111) in the determination of total sulphur in coal by the oxygen-flask method [electronic resource] / S.M. Ahmed and B.J.P. Whalley, Fuels Research Centre. Use of arsenazo(III) in the determination of total sulphur in coal by the oxygen-flask method Ottawa : Information Canada, 1972. p. 217-219 Reprint series ; RS 111 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]. Includes bibliographical references. "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. gccst Coal gccst Testing Whalley, B. J. P. Canada. Natural Resources Canada. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Reprint series - Dept. of Energy, Mines and Resources, Mines Branch ; RS 111 (CaOODSP)9.834843 PDF 1.50 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M38-8/M38-8-111-eng.pdf 300190