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测定了不同采收部位南玉桂挥发油的含量，并用GC－MS法鉴定了其中的化学成分，分析结果初步认为上皮质量优于下皮。
The contents of the volatile oil from the southern part of Cinnamomum burmanii in different harvested parts were determined, and the chemical components were identified by GC-MS. The analysis results preliminarily confirmed that the quality of epithelium was better than that of the lower part.