gas chromatography/mass spectrometry
气相色谱/质谱法
GC/MS
气相色谱/质谱法
GC-MS ; Gas chromatography-mass spectrometry ; essential oils ; gas chromatography-mass spectrography
GCMS ; gas chromatorgaphy-mass
GC-MS ; GC-MS method ; Essential oils ; Gas chromatography - mass spectrometry