DESIGN AND PERFORMANCE OF A PLASMA-SOURCE MASS SPECTROGRAPH

Citation
Tw. Burgoyne et al., DESIGN AND PERFORMANCE OF A PLASMA-SOURCE MASS SPECTROGRAPH, Journal of the American Society for Mass Spectrometry, 8(4), 1997, pp. 307-318
Citations number
74
Categorie Soggetti
Chemistry Physical","Chemistry Analytical",Spectroscopy
ISSN journal
10440305
Volume
8
Issue
4
Year of publication
1997
Pages
307 - 318
Database
ISI
SICI code
1044-0305(1997)8:4<307:DAPOAP>2.0.ZU;2-R
Abstract
A plasma-source, simultaneously detecting, Mattauch-Herzog mass spectr ograph for multielement analysis was developed. Simultaneous detection should improve throughput, precision, and sensitivity over those inst ruments that use quadrupole or sector mass spectrometers. The new inst rument is compact (approximately 80 cm in length) and is designed to d etect a complete atomic mass spectrum in two mass windows that straddl e but avoid argon. The design and some figures of merit are presented. With a dc glow discharge source, a precision of 0.5% determined from eight consecutive 10-s images was obtained for Cu isotope ratios in Na val Brass B. With the same sample, nickel and lead were detected at li mits of 8 and 1 ppm. Measured Mg isotope ratios with an inductively co upled plasma source were within 4% of the expected values. The resolut ion at full width at half maximum is currently limited to approximatel y 60, in part because of poor peak shape. The origin of this peak shap e has been determined to lie within the array detector and possibly re sults from its interaction with the fringing magnetic fields produced by the second sector. (C) 1997 American Society for Mass Spectrometry.