Accurate mass measurement method of ion mass spectrometer and ion trap / time-of-flight

摘要

PROBLEM TO BE SOLVED: To provide an ion trap/time-of-flight mass spectrometer capable of precise mass measurement of product ions in MS/MS and MSⁿ in addition.;SOLUTION: Using the ion trap/time-of-flight mass spectrometer equipped with an ion source for ionizing a testpiece, an ion trap capable of temporarily trapping ions, and a time-of-flight mass spectrometer; ions of a testpiece being a measuring object and a standard substance having an already-known mass number are generated with the ion source. From among the ions of the testpiece as a measuring object, precursor ions are selected, and product ions are generated by exciting and cleaving the precursor ions in the ion trap. After that, the ions of the standard substance are led into the ion trap and trapped, the product ions and the ions of the standard substance having been trapped are ejected from the ion trap and led into the time-of-flight mass spectrometer, to obtain mass spectra.;COPYRIGHT: (C)2006,JPO&NCIPI