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 ?
Strictly, mass spectrums report "m/Z," mass divided by charge, which corrects for this; and in our pattern matching type application, this proportion of fragments with multiple charges just adds additional spectral peaks which form part of the overall pattern.
The model mass spectrum (10) is logarithmically symmetric and the main spectral nodes arise on the distance of 1 and 1/2 logarithmic units, as fig.
The mass spectrum of compound(4) determined by Electron impact mass spectrometry (EIMS) exhibited a prominent molecular ion peak ([M.
Flavonoid (II) was identified as quercetin 3-O-rhamnoside-7-O-glucoside by UV spectral analysis with the customary shift reagents, total acid hydrolysis which gave quercetin, D-glucose and L-rhamnose and electrospray mass spectrum (positive mode) which showed a quasimolecular ion [[M+H].
The QP-2010 Plus is also equipped with software allowing simultaneous Scan/SIM modes that enable detailed information on compounds of interest without sacrificing data across the entire mass spectrum.
Then students analyze the mass spectrum data from Robert's air samples to solve the puzzle of whether the haze blew in over the water to the west or came from forest fires to the east.
But in getting to the methodology that is utilized for the routine use you need a lot of flexibility to characterize the complete system of sample and matrix, and for that you want the flexibility of utilizing different ionization modes with different ion polarities, different ways of generating the mass spectrum.
Depending on the energy of bombarding electrons, either the parent molecular ion or a more or less extended mass spectrum can be produced.
The presence of 9-hydroxyphenanthrene in the yeast culture was corroborated by the analysis of 9-hydroxyphenanthrene standard that showed the same GC retention time and mass spectrum.
Lastly, optimizing the matrix to analyte ratio as a function of analyte molecular mass was shown to be critical in obtaining quantitative results from the mass spectrum.