| 摘要 |
A method of encoding a parent or precursor ion beam to aid product ion assignment is disclosed. Different species of parent ion are caused to have different intensity profiles as a function of time or as a function of a parameter, e.g. collision energy, when said parameter is varied between a plurality of different values. Fragment or product ions derived from said parent ions are correlated/assigned to their corresponding parent ions or other fragment/product ions based upon the intensity profiles of said parent and product ions as a function of time or said parameter. Alternatively, parent ions may be caused to adopt different spatial locations at an instance in time, with said assignment/correlation of derived fragment/product ions being based on the spatial positions of said parent and fragment ions. |
