Patent ID: 10192724

Abstract:
When, in performing MS/MS analysis on a multivalent ion originated from a target component, an analyzing operator inputs at least two values of a mass value mLoss of an eliminated fragment, a valence zLoss of the eliminated fragment, a valence zPrec of a precursor ion and a valence zProd of a product ion by an inputting unit, a valence calculating unit calculates an uninput valence zPrec or zProd based on the relation, zPrec=zProd+zLoss. Upon the start of the MS/MS analysis, a precursor ion m/z setting unit sets m/z=MPrec of an ion that passes through a front-stage quadrupole mass filter , and a passed product ion m/z calculating unit calculates m/z=MProd of the product ion that passes through a rear-stage quadrupole mass filter by applying MPrec, mLoss, zPrec and zProd above to the relational expression, MProd=(MPrec×zPrec−mLoss)/zProd.