ISSN:
0306-042X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A MAT 731 mass spectrometer has been modified to permit multiple ion monitoring at resolutions of 8000-10 000. The greater imprecision in response ratio (analyte/internal standard) determinations which accompanies the increase in mass spectrometric resolution is attributable to the weaker signal detected, rather than to instrument instability. The mass spectrometer has been coupled to a microprocessor-based data system and software prepared to facilitate the precise determination of response ratios. Imprecision is markedly reduced when isotope ratios are determined by linear regression analyses of signals attributable to the two ionic species detected.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200110810
