采用同位素稀释-高分辨气质联用技术对京杭运河杭州市区段表层沉积物中二恶的分布进行研究。

The PCDD/Fs in surface sediments of Great Canal in Hangzhou city were analyzed by isotope Dilution HRGC/HRMS method.

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方法：采用水蒸气蒸馏法和气质联用技术对新疆引种玛咖中的挥发油成分进行分析，并研究提取时间、缓冲液浓度对玛咖挥发油主成分的影响。

Methods:Essential oil was extracted from Xinjiang maca by steam distillation, and then was subjected to chemical component analysis by gas chromatography-mass spectrometry(GC-MS).

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