PRECISE MEASUREMENT OF MASS

摘要

PURPOSE:To perform rapid and precise measurement of mass number, by performing operation treatment after the peak profile from a detector and the data signal from a mass marker are stored. CONSTITUTION:The specimen molecule ionized in the mass separation means 2 of a mass analytical apparatus 1 is separaed and detected in a detector 3 by magnetic field scanning and the detected signal is passed through an AD converter to be inputted to a peak discrimination means 6 where the peak profile of a signal equal to or more than a threshold value is stored while a rough mass number from a mass maker 5 is stored. The stored data are subjected to operation treatment by a memory operation means 7 to rapidly calculate a precise mass number. This operation is repeated at every magnetic field scanning.