... phase-crossover frequency,相位交越频率 normalized mass spectrum,归一化质谱 photoelectric colorimeter,光电比色法 ...
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挥发油的化学成分。 方法用气相色谱-质谱（GC/ MS）联用技术，应用峰面积归一化法测定各组分的相对含量。
Methods The chemical components of volatile oil were analyzed by gas chromatography-mass spectraphy (GC/MS), and their relative contents were determined by peak area normalization.
用气相色谱质谱联用法对其化学成分进行鉴定，用归一化法计算各组分的相对百分含量。
The components of the volatile oil were separated and identified by GCMS. The relative content of each component was determined by area normalization.
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