This International Standard specifies a method for the determination of the sulphur content of aromatic hydrocarbons boiling below 200 °C. The method is directly applicable to sulphur contents of 0,1 to 30 mg/kg; higher contents may be determined by suitable dilution of the sample. Alkylsulphones, arylsulphonic acids and arylsulphonates all give incomplete recovery of sulphur.