Linked scan: Difference between revisions
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:[[Linked Scan at Constant B2/E|Linked scan at constant B< | :[[Linked Scan at Constant B2/E|Linked scan at constant B<sup>2</sup>/E]] | ||
::This can be performed with a sector instrument incorporating at least one electric sector plus one magnetic sector. The accelerating voltage is fixed and the magnetic field, B, and the electric field, E, are scanned simultaneously so as to maintain B 2/E constant. This constant value corresponds to the ratio of the two fields which transmits mainbeam ions of predetermined mass/charge ratio; these preselected main-beam ions are the fragment ions whose precursor ion spectrum is required. The fragmentation reactions thus observed occur in a field-free region traversed before the two sectors scanned in this way. The term ' | ::This can be performed with a sector instrument incorporating at least one electric sector plus one magnetic sector. The accelerating voltage is fixed and the magnetic field, B, and the electric field, E, are scanned simultaneously so as to maintain B<sup>2</sup>/E constant. This constant value corresponds to the ratio of the two fields which transmits mainbeam ions of predetermined mass/charge ratio; these preselected main-beam ions are the fragment ions whose precursor ion spectrum is required. The fragmentation reactions thus observed occur in a field-free region traversed before the two sectors scanned in this way. The term 'E<sup>2</sup> | ||
:[[Linked Scan at Constant E2/V|Linked Scan at Constant E< | :[[Linked Scan at Constant E2/V|Linked Scan at Constant E<sup>2</sup>/V ]] | ||
::This may be performed with a sector instrument incorporating at least one electric sector plus one magnetic sector. The electric sector field, E, and the accelerating voltage, V, are scanned simultaneously so as to maintain E<sup>2</sup>/V ratio at constant value equal to the value of this ratio that transmits the main beam ions through the electric sector. The magnetic sector field is set at a fixed value such that main-beam ions of a predetermined mass/charge ratio are transmitted by the magnetic sector; these preselected main-beam ions are the precursor ions whose fragment ion spectrum is required. The fragmentation reactions thus observed occur in a field-free region traversed before the two sectors scanned in this way. The term 'E<sup>2</sup> | |||
