“…This technique is called in-source fragmentation-or in-source collisioninduced dissociation. In-source fragmentation has been used in structural elucidation ( 14 ), compound identifi cation (15)(16)(17), compound profi ling ( 18 ), and bioanalysis ( 19 ). In-source fragmentation of HP- -CD, which was promoted by increasing declustering potentials on a 4000QTRAP mass spectrometer, led to glycosidic-bond cleavage and simultaneous fragmentation of all the HP- -CD …”