GC／MS分析煤抽出物中的含硫多环芳香化合物

CHARACTERIZATION OF POLYNUCLEAR AROMATIC SULFUR-HETEROCYCLES IN A COAL EXTRACT BY GC/MS

煤的索氏抽出物中的含硫多环芳香化合物（ＰＡＳＨ）由硅胶柱色谱与配体交换薄层色谱（ＰｄＣｌ＿２／ＳｉＯ＿２）两步分离，用毛细管气相色谱（ＦＩＤ与ＦＰＤ）和色质联用仪分析其组成、结构。通过与文献的色谱保留指数相比较、质谱数据验证，鉴定出贵定煤含硫芳香化合物以三、四环结构为主，主要是二苯并噻吩及其Ｃ＿１～Ｃ＿３烷基取代物、苯并萘并噻吩及其烷基取代物，其它稠环含硫芳香化合物较少。

Polynuclear aromatic sulfur heterocycles(PASHs)were isolated from a coalextract by two-step separation method using silica gel column chromatography and ligandexchange thin layer chromatography(PdCl_2/SiO_2).The subfraction was examined by capil-lary column gas chromatography with flame ionization detector and flame photometric detec-tor and gas chromatography-mass spectrometry.Identification was accomplished by com-parison of chromatographic retention indices and mass spectra of compounds with those re-ported in the literatures.It was found that the principal structures of the sulfurcontainingfraction of Guiding coal extract have 3～4 aromatic rings. Dibenzothiophene,C_1～C_3 alkylat-ed dibenzothiophenes,benzonaphthothiophene and its alkylated derivatives were the maincomponents.Only a few of other polynuclear sulfur heterocycles were detected. No benzoth-iophene and its derivatives were present.