Commonly Lost Fragments Common Stable Ions m-15 .CH3 + mle =43 CH3C三0 m-17 .OH m-26 .CN m-28 H2C=CH2 m/e =91 m-29 .CH2CH3 .CHO m-31 .OCH3 m-35 .CI mle m-1 RC三0 m-43 CH C=0 m-45 .OCH2CH3 m-91 CH2 上页下页返回