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Titolo:
TIME-BASE MODULATION FOR THE CORRECTION OF CYCLOTRON FREQUENCY-SHIFTSOBSERVED IN LONG-LIVED TRANSIENTS FROM FOURIER-TRANSFORM ION-CYCLOTRON-RESONANCE MASS-SPECTROMETRY OF ELECTROSPRAYED BIOPOLYMERS
Autore:
BRUCE JE; ANDERSON GA; HOFSTADLER SA; WINGER BE; SMITH RD;
Indirizzi:
BATTELLE MEM INST,PACIFIC NW LABS,DEPT CHEM SCI,CHEM METHODS & SEPARAT GRP RICHLAND WA 99352 BATTELLE MEM INST,PACIFIC NW LABS,DEPT CHEM SCI,CHEM METHODS & SEPARAT GRP RICHLAND WA 99352
Titolo Testata:
Rapid communications in mass spectrometry
fascicolo: 8, volume: 7, anno: 1993,
pagine: 700 - 703
SICI:
0951-4198(1993)7:8<700:TMFTCO>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-FIELD; IONIZATION; DESORPTION; PROTEINS; SPECTRA; ENTROPY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
J.E. Bruce et al., "TIME-BASE MODULATION FOR THE CORRECTION OF CYCLOTRON FREQUENCY-SHIFTSOBSERVED IN LONG-LIVED TRANSIENTS FROM FOURIER-TRANSFORM ION-CYCLOTRON-RESONANCE MASS-SPECTROMETRY OF ELECTROSPRAYED BIOPOLYMERS", Rapid communications in mass spectrometry, 7(8), 1993, pp. 700-703

Abstract

The occurrence of small shifts in the cyclotron frequency during the acquisition of very long transients (in excess of 80 s) has been observed to be a limiting factor for ultrahigh-resolution mass measurementsof protein ions performed with electrospray-ionization Fourier-transform ion-cyclotron-resonance mass spectrometry. Resolution measurementswere restricted to values less than 10(6) because of the frequency shifts. Measurements of the frequency shifts, performed by sequentially transforming small segments of the transient, allowed the shift to be characterized and fitted to a 4th-order equation. The sampling rate ofthe acquired transient was then modulated (at a rate equal to the reciprocal of the rate for the frequency shift) to allow ultrahigh resolution, greater than 2 X 10(6), and improved mass measurement and precision to be achieved for a small protein.

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Documento generato il 10/07/20 alle ore 15:12:12