求助文献: 期刊:Organic Mass Spectrometry 年卷期页码:1989, 24(2), 817-822 作者:Todd A. Gillespie, Laszlo Urogdi, Alan R. Katritzky, Richard A. Yost 标题:Studies of phthalic acid and related compounds by positive- and negative-ion chemical ionization tandem mass spectrometry (± CI/MS/MS)