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Determination of chemical composition and isotope distribution with mass spectrometry
Determination of chemical composition and isotope distribution with mass spectrometry
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机译：质谱法测定化学成分和同位素分布
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摘要
A method for determining elemental composition of ions from mass spectral data, comprising obtaining at least one mass measurement from mass spectral data; obtaining a search list of candidate elemental compositions whose exact masses fall within a given mass tolerance range from the accurate mass; reporting a probability measure based on a mass error; calculating an isotope pattern for each candidate elemental composition from the search list; constructing a peak component matrix including at least one of the isotope pattern and mass spectral data; performing a regression against at least one of isotope pattern, mass spectral data, and the peak component matrix; reporting a second probability measure for at least one candidate elemental composition based on the isotope pattern regression; and combining the two the probability measures into an overall probability measure. A method for determining elemental isotope ratios from mass spectral data.
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