mass-to-charge ratio


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mass-to-charge ratio

A physical parameter widely used in electron microscopy, nuclear physics and mass spectrometry to quantify particles and their effect on the system.
References in periodicals archive ?
This approach is highly selective and only molecular species with the desired combination of the precursor and product ion mass-to-charge ratio (m/z) are transmitted to the detector.
ionization of protein molecules, analyzer detection, and mass-to-charge ratio separation.
Ions of different mass-to-charge ratios are then resolved in the time domain based upon their velocities through a field-free flight tube.
Just as a monochromator in emission/absorption spectrometry separates light according to wavelengths, a quadrupole mass analyzer used in AMS separates the ions of various elements into their mass-to-charge ratio.
Ions of only one particular mass-to-charge ratio will traverse the mass filter in a tight and stable spiral and be collected by the detector.
the mass-to-charge ratio (m/z) is defined as a dimensionless quantity, although the physics of the accepted terminology are questionable because a quantity so defined cannot be used in equations of motion for charged particles.
1B), and the mass spectra of all 96 fractions are combined, producing a two-dimensional display of peptide masses in which the abscissa displays the mass-to-charge ratio, the ordinate is determined by the retention time on the RP-HPLC column, and the signal intensity is depicted by color saturation (Fig.
In selected ion storage, an ion of a single mass-to-charge ratio (m/z) is retained in the QIT at a time, much like SIM operation of a quadrupole mass filter.
With oligonucleotides, the unfavorable mass-to-charge ratio tends to cause comigration of larger mixture components.
Mass spectrometer first ionizes the chemical compound to produce charged molecules or molecule fragments and then measures their mass-to-charge ratios [4].
Online Supplemental Table 2 lists the mass-to-charge ratios (m/z) of precursor and product ions corresponding to monoisotopic molecular mass of substrates, products, and internal standards plus a proton or sodium cation (ID2S-S and GAL6S-S only).