• Ion mobility separation

    Recently we purchase an Ion mobility QTOF (IMMS) and run simple application with small molecules that shows 3 peaks for our marker. A question raised from our colleagues about the possibility that IMMS can separate t...
    lsulimani
    last modified by lsulimani
  • ?a new problem with front inlet shutdown in high efficient GCMS

     Dear colleagues      we encountered a new problem with front inlet shutdown in high efficient GCMS , the inlet itself appear OK before the beginning of run method and still OK during syringe ...
    walleed
    created by walleed
  •    the library search score for a compound is different with different instrument

      .the library search score for a compound is different with different instruments nowadays,in my work we have different types of gc-ms, we bought new gcms 7890B- 5977B HES , when comparing the result of the same...
    walleed
    last modified by walleed
  • Negative Mode - Peptides

    in LC-MS, i was wondering how does negative ionization  (Negative Mode) work with peptides? Same sample has shown differece in the intensity of the ionization, it is much lower in negative mode .. the negative is...
    weaam.dakda
    created by weaam.dakda