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本文用毛细管气相色谱法测定以邻二甲苯氧化制得的苯酐及其杂质的含量．该法简单．快速．准确，满足生产的控制分析．
In this paper, capillary gas chromatography was used to determine the content of phthalic anhydride and its impurities prepared by oxidation of o-xylene. This method is simple. fast. Accurate, to meet the production control analysis.