2874.     ROELEN, O., AND FEISST, W.  [Improved Method for the Determination of Sulfur in Gas.]  Brennstoff-Chem., vol. 15, 1934, pp. 187-192; Chem. Abs., vol. 28, 1934, p. 6278.

        Method of Heinrich and Petzoid for the determination of total or organic combined S has been improved mechanically, to permit greatly increased throughput and absorption in alkaline H₂O₂.  Apparatus for the combustion method has been improved also.  Typical comparative data for both old and new apparatus are given with demonstration of the decreasing organic S content of gases with storage.  Completely purified gas also is shown to reacquire S from distribution systems.  For comparative purposes, gas samples must be identical in time, place, and other sampling conditions.  Extensive bibliography of S-determination methods, grouped according to absorption agents.