Inductively double focusing

Walder AJ, Freedman PA (1992) Isotopic ratio measurement using a double focusing magnetic sector mass analyser with an inductively coupled plasma as an ion somce. J Anal At Spectrom 7 571-575... 

Recently, Hieftje et al.15-16 equipped a small double-focusing mass spectrograph built in house with Mattauch-Herzog geometry with several ion sources (such as glow discharge, an inductively coupled plasma ion source or a microwave plasma torch) and a novel array detector for simultaneous ion detection. 

As an alternative to commercial quadrupole based ICP-MS measurements at low mass resolution ( / 300), in 1996 Yiang and Douglas15 proposed a quadrupole ICP-MS system which allows a maximum mass resolution of 9000. At a mass resolution of 5000 the sensitivity was comparable to that of a commercial double-focusing sector field ICP-MS operated at the same mass resolution. Due to the very high continuum instrumental background of about lOOOcps no commercial high resolution quadrupole instrumentation with an inductively coupled plasma source exists and the development of high resolution quadrupole based ICP-MS has ceased. 

Figure 5.22 Schematic of laser ablation inductively coupled plasma mass spectrometer a laser ablation system (wa velength 213 nm) is coupled to a double-focusing sector field ICP-MS (Element, Thermo Fisher Scientific, Bremen). The cooled laser ablation chamber using two Peltier elements was developed in the author s laboratoryJ26 (M. V. Zoriy, M. Kayser, A. Izmer, C. Pickhardt and J. S. Becker, Int. J. Mass Spectrom., 242, 297 (2005). Reproduced by permission of Elsevier.)...

L. Moens, F. Vanhaecke, J. Riondato, R. Dams, Some figures of merit of a new double focusing inductively coupled plasma mass spectrometry, J. Anal. Atom. Spectrom., 10... 

J. M. Marchante-Gayon, C. Sariego Muniz, J. I. Garcia Alonso, A. Sanz-Medel, Multi-elemental trace analysis of biological materials using double focusing inductively coupled plasma mass detection, Anal. Chim. Acta, 400 (1999), 307-320. 

Begerov, J., Turfeld, M., Duneman, L. Determination of physiological palladium, platinum, iridium and gold levels in human blood using double focusing magnetic sector field inductively coupled plasma mass spectrometry. J. Anal. At. Spectrom. 12, 1095-1098 (1997)... 

C. Barbante, T. Bellomi, G. Mezzadri, P. Cescon, G. Scarponi, C. Morel, S. Jay, K. Van de Velde, C. Ferrari, C. F. Boutron, Direct determination of heavy metals at picogram per gram level in Greenland and Antarctic snow by Double Focusing Inductively Coupled Plasma Mass Spectrometry, J. Anal. At. Spectrom., 12 (1997), 925-931. 

Becker J. S. and Dietze H. J. (1998) Ultratrace and precise isotope analysis by double-focusing sector field inductively coupled plasma mass spectrometry, J Anal At Spectrom 13 1057-1063. 

Trace element determination in alpine snow and ice by double focusing inductively coupled plasma mass spectrometry with microconcentric nebuliza-tion. ] Anal Atom Spectrom 14 1433-1438. 

Riondato j, Vanhaegke F, Moens L and Dams R (1997) Determination of trace and ultratrace elements in human serum with a double focusing magnetic sector inductively coupled plasma mass spectrometer. J Anal At Spectrom 12 933-937. 

Upon removal from the vacuum chamber, samples are dissolved in acid (HNO3 for apatite, HCl for monazite and xenotime) and spiked for U and Th analysis. At Caltech we spike with U and Th and analyze U and Th isotope ratios on a Finnigan Element double-focusing inductively-coupled plasma mass spectrometer. The accuracy and precision of these measurements is typically better than 0.5%. 

Schaumloffel, D., Giusti, P., Zoriy, M. V., Pickhardt, C., Szpunar, J., Lobinski, R., and Becker, J. S. 2005. Ultratrace determination of uranium and plutonium by nano-volume flow injection double-focusing sector field inductively coupled plasma mass spectrometry (nFI-ICP-SFMS). J Anal Atom Spectrom 20(1), 17-21. 

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