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使用碱洗提酚法提取煤液化油中的酚类化合物,然后结合Deans Switch装置和LTM色谱柱模块,采用中心切割气相色谱(GC)-质谱(MS)法对提取的酚类化合物进行定性。采用GC建立标准曲线,对煤液化油中主要酚类化合物的质量分数进行测定,并测定了煤液化油中邻甲基苯酚、2-乙基苯酚、4-丙基苯酚和5-茚酚4种酚类化合物的加标回收率。结果表明,在煤液化油中共定性出51种酚类化合物,测定了其中的35种酚类化合物的质量分数,其量占煤液化油总量的2.54(wt)%,苯酚和烷基苯酚占35种酚类化合物的88.2(wt)%。煤液化油中4种酚类化合物的加标回收率高,重复性好。
Phenolic compounds in coal liquefaction oil were extracted by alkaline elution phenol method. Then, the extracted phenolic compounds were characterized by central cut-off gas chromatography (GC) -mass spectrometry (MS) combined with Deans Switch and LTM column module. The standard curve of GC was used to determine the mass fraction of main phenols in coal liquefaction oil. The contents of o-methylphenol, 2-ethylphenol, 4-propylphenol and 5-indolphenol 4 Phenolic compounds spiked recoveries. The results showed that 51 kinds of phenolic compounds were identified in coal liquefaction oil and the content of 35 kinds of phenolic compounds was 2.54 (wt)% of the total amount of liquefied petroleum gas. Phenol and alkylphenol accounted for 88.2 (wt)% of 35 phenolic compounds. Coal liquefaction oil four phenolic compounds spiked high recovery, good repeatability.