mass spectrum


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mass spectrum

a characteristic pattern obtained from a mass spectrometer.

mass spec·trum

(mas spek'trŭm)
A distribution of charged particles arranged in the order of mass.
References in periodicals archive ?
Trimethylsilyl-enol (TMS-enol) and TMS-oxime derivatization mass spectrum studies.
In 1 case (IgM[lambda]), there was a detectable peak in the LC m/z region in the IgM mass spectrum, but it was absent from the corresponding [lambda]-NB mass spectrum.
Well, it turns out that if we use a relatively uniform sample of bacteria such as a single colony from a microbiological media plate as a target, we get a very complex mass spectrum pattern out of our MALDI-TOF.
Reading chemical fine print: Resolution and identification of 3000 nitrogen-containing aromatic compounds from a single electrospray ionization Fourier transform ion cyclotron resonance mass spectrum of heavy petroleum crude oil.
The frequency spectrum (7) and the mass spectrum (10) are isomorphic.
This is further confirmed by the presence of peaks at 14 mass units apart in the mass spectrum of compound (2).
It provides mass spectrum measurement speeds of 15,000 u/sec without sacrificing sensitivity and rapid polarity switching (15 msec) without signal deterioration, according to the company.
According to the company, the new UFscanning technology achieves mass spectrum measurement speeds of 15,000 u/sec, without sacrificing sensitivity or resolution, and the UFswitching technology achieves 15 millisecond polarity switching, enabling accurate data from even the fastest chromatographic peaks without any loss of peak height.
Thus, the mass spectrometer acquires a "survey" mass spectrum, followed by tandem mass spectra (MS/MS spectra) of precursor ions identified in the earlier survey mass spectrum.
mass spectrum abundances) and choice of fuzzy inference operators to translate linguistic antecedent into confidence values for the consequence (or in this case the classification) is followed by using the maximum confidence and a necessary minimum threshold for making a crisp decision.