同义词
1)chemical ionization source,化学离子源2)negative chemical ionization(NCI),负化学离子源3)negative ion chemical ionization(NICI),负化学离子源（NICI）4)APCI,大气压化学离子源5)Gas chromatography-negative chemical ionization mass spectrometry,气相色谱-负化学离子源质谱6)Gas chromatography-negative chemical ionization/mass spectrometry,气相色谱-负化学离子源/质谱
