【摘要】 <正> 邻、间、对甲酚的三种同分异构体的物理性质和化学性质相似,特别是间、对甲酚的极性相似,沸点相差不到1℃。而且酚类的羟基与载体表面的活性中心容易产生吸附,致使峰形拖尾,给色谱分离带来了困难。同时,酚类易吸水,容易使分离变差。这对固定相或样品转化处理提出了要求。因此,甲酚异构体直接进样的气相色谱分析,一直是较为困难的问题。据国外报道,用毛细管柱,气、液、固更多还原

【Abstract】 This paper introduces the synthetic method for PBOB liquid crystal stationary liquid which is used for the analysis of cresol isomers PBOB liquid crystal is used as stationary liquid, a little phosphoric acid is added as tailing reducer, they are coated onto 405 white silanized support to make the stationary phase for GC analysis. Samples can be injected directly without conversion. It is used successfully to separate and analyze cresol isomers and the components of other phenols. Standard deviation is σ≤0.5, absolute error is within 1%. The results have been compared with those of m-cresol content determined by carbamide method. The influence of phenol, o-cresol, naphthalene, xylenol, water and operation conditions on the crystal point of carbamide method has been studied.The chromatographic analysis is rapid, accurate and with better reproducibility. The column efficiency is stable and the column life is longer than one year. It is better than the carbamide method and is suggested to be used as a standard method.更多还原