ISO 5282-1982 芳香烃 硫含量的测定 皮特-鲁普雷克特还原和分光光度法

标准号：ISO 5282-1982
中文标准名称：芳香烃 硫含量的测定 皮特-鲁普雷克特还原和分光光度法
英文标准名称：Aromatic hydrocarbons; Determination of sulphur content; Pitt-Ruprecht reduction and spectrophotometric method
标准类型：G15
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G15
国际标准分类号：71.080.15
适用范围：Relates to products boiling below 200 鳦. 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-p-phenylenediamine sulphate and iron(III) ammonium sulphate. Determination of the absorbance of the blue coloured solution at a wavelength of 667 nm.