标准摘要
[中文适用范围]： 涉及沸点低于 200 的产品。 直接适用于0.1mg/kg至30mg/kg的含量。 可以通过适当稀释样品来测定更高的含量。 烷基砜、芳基磺酸和芳基磺酸盐不能完全回收硫。 用雷尼镍将硫化合物还原为硫化镍。 在盐酸介质中汽提硫化氢并在碱性醋酸锌溶液中吸收。 与 N,N-二甲基对苯二胺硫酸盐和硫酸铁(III)铵形成亚甲基蓝。 测定蓝色溶液在 667 nm 波长处的吸光度。 [外文原描述]： 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-p-phenylenediamine sulphate and iron(III) ammonium sulphate. Determination of the absorbance of the blue coloured solution at a wavelength of 667 nm.
英文名称Aromatic hydrocarbons — Determination of sulphur content — Pitt-Ruprecht reduction and spectrophotometric method