Chromatograph mass spectrometer

Abstract

In order to appropriately set MSanalysis conditions, an MSanalysis executer () makes a mass spectrometer () perform an MSanalysis (where m is an integer from 2 to n) to acquire three-dimensional data showing an intensity for each of the N m/z values and each of the M retention times (where N and M are natural numbers). Based on the three-dimensional data, a data matrix creator () creates data matrix X in which intensity data are arranged in N rows which differ from each other in m/z value and M columns which differ from each other in retention-time value. A matrix factorization executer () determines an N×K spectrum matrix S and K×M profile matrix P (where K is a natural number) by matrix factorization based on data matrix X so that this matrix X is approximated by product SP of the matrices S and P. An m/z detector () detects m/z of a precursor ion originating from a sample component from the values of the matrix elements in each column of matrix S. A retention time detector () detects the retention time of a sample component from the values of the matrix elements in each row of matrix P. Based on the m/z and retention time, an MSanalysis execution condition determiner () determines an execution condition of an MSanalysis including the selection and fragmentation of a precursor ion of a sample component. An MSanalysis executer () makes the mass spectrometer execute an MSanalysis based on the execution condition.