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一、引言对、间、邻位二甲苯和乙苯由于它们的物化性质十分相近(表1),采用通常的气相色层分析方法很难完全分离。近年来,在气相色层分析中应用二种技术,使二甲
I. INTRODUCTION The xylene and ethylbenzene are very close to each other due to their physico-chemical properties (Table 1). It is difficult to separate them completely by the usual gas chromatographic method. In recent years, two techniques have been applied to gas chromatographic analysis to make Dimethyl