• involves
  • Tandem MS in space uses the coupling of two instrument components which measure the same mass spectrum range but with a controlled fractionation between them in space, while tandem MS in time involves the use of an ion trap. (wikipedia.org)
  • precursor
  • For a precursor ion scan, the product ion is selected in the second mass analyzer, and the precursor masses are scanned in the first mass analyzer. (wikipedia.org)
  • In a product ion scan, a precursor ion is selected in the first stage, allowed to fragment and then all resultant masses are scanned in the second mass analyzer and detected in the detector that is positioned after the second mass analyzer. (wikipedia.org)
  • 4. The system of claim 1, wherein the precursor mass selection window widths are selected to contain the same number of mass values. (freepatentsonline.com)
  • fragments
  • The fragments are then accelerated out of the collision cell and enter Q3 which scans through the mass range, analyzing the resulting fragments (as they hit a detector). (wikipedia.org)
  • corresponds
  • Tandem MS was necessary for resolving complications presented by the fact that (NeuGc:Fuc) corresponds to the exact mass of (NeuAc:Hex). (nih.gov)
  • detector
  • High-resolution instruments are usually operated in an untargeted manner, which means that accurate mass information is collected on every ion that reaches the detector. (aacc.org)
  • instruments
  • Comparison of results obtained using sector-quadrupole hybrids with those from tandem double focusing instruments. (springer.com)
  • And, importantly, how does this compare to nominal mass instruments that collect data in a targeted manner? (aacc.org)
  • modes
  • When tandem MS is performed with an in space design, the instrument must operate in one of a variety of modes. (wikipedia.org)
  • data
  • Deconvoluted CID data for (A) a high mannose N-glycan with m/z 1235.45 corresponding in mass to [GlcNAc 2 +Man 5 +H] +1 . (nih.gov)