71.080.15 - Aromatic hydrocarbons

ISO 5275: 2003 specifies a procedure (Doctor test) for the detection of thiols (mercaptans), hydrogen sulfide and elemental sulfur in hydrocarbon solvents and distillate petroleum feedstocks and products.

ISO 5275: 2003 specifies a procedure (Doctor test) for the detection of thiols (mercaptans), hydrogen sulfide and elemental sulfur in hydrocarbon solvents and distillate petroleum feedstocks and products.

Relates to products boiling below 200 °C. Directly applicable to contents of 0.1 mg/kg to 30 mg/kg. Higher contents may be determined by a suitable dilution of the sample. Alkylsulphones, arylsulphonic acids and arylsulphonates give incomplete recovery of sulphur. Reduction of the sulphur compounds to nickel sulphide with Raney nickel. Stripping of the hydrogen sulphide in hydrochloric acid medium and absorption in an alkaline zinc acetate solution. Formation of methylene blue with N,N-dimethyl-...view more

These products are similar to petroleum products; many sampling procedures used for petroleum products are equally applicable to the former. Specifies the obtaining of samples from fixed tanks, railcars, road vehicles, barges and drums and from liquids being pumped in pipelines. The samples are intended to be used determine quality, for testing whether contaminants are present and for the determination of the degree of homogeneity of a batch. General recommendation and specific recommendations f...view more

Applicable to products which consist essentially of xylene isomers ÄC6H4 -(CH3 )2 Ü and ethylbenzene (C6H5 -C2 H5). Specifies the requirements and test methods. The required characteristics are shown in a table.

Specifies requirements for two grades. Grade 1 (synthesis grade) is a high quality grade normally required only for the use as a chemical feedstock. Grade 2 (ordinary grade) is suitable for most normal commercial uses. The requirements are given in a table.