“…Singh et al (73) claimed that a digestion mixture containing K2Cr04, NaOH, and H202 quantitatively transformed organic sulfur to S042". Other workers (74,75) converted the sulfur to S02 which was determined by iodimetry. Special techniques were reported for the determination of sulfur in coals (76), naphthas (77), hydrocarbons containing large amounts of chlorine (78), biological substances (79), plant materials (80), and of sulfur-35 (81,82).…”