Evaluation of a 512-channel Faraday-strip array detector coupled to an inductively coupled plasma Mattauch-Herzog mass spectrograph

Gregory D. Schilling, Steven J. Ray, Arnon A. Rubinshtein, Jeremy A. Felton, Roger P. Sperline, M. Bonner Denton, Charles J. Barinaga, David W. Koppenaal, Gary M. Hieftje

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

A 512-channel Faraday-strip array detector has been developed and fitted to a Mattauch-Herzog geometry mass spectrograph for the simultaneous acquisition of multiple mass-to-charge values. Several advantages are realized by using simultaneous detection methods, including higher duty cycles, removal of correlated noise, and multianalyte transient analyses independent of spectral skew. The new 512-channel version offers narrower, more closely spaced pixels, providing improved spectral peak sampling and resolution. In addition, the electronics in the amplification stage of the new detector array incorporate a sample-and-hold feature that enables truly simultaneous interrogation of all 512 channels. While sensitivity and linear dynamic range remain impressive for this Faraday-based detector system, limits of detection and isotope ratio data have suffered slightly from leaky p-n junctions produced during the manufacture of the semiconductor-based amplification and readout stages. This paper describes the new 512-channel detector array, the current dominant noise sources, and the figures of merit for the device as pertaining to inductively coupled plasma ionization.

Original languageEnglish (US)
Pages (from-to)5467-5473
Number of pages7
JournalAnalytical chemistry
Volume81
Issue number13
DOIs
StatePublished - Jul 1 2009

ASJC Scopus subject areas

  • Analytical Chemistry

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    Schilling, G. D., Ray, S. J., Rubinshtein, A. A., Felton, J. A., Sperline, R. P., Denton, M. B., Barinaga, C. J., Koppenaal, D. W., & Hieftje, G. M. (2009). Evaluation of a 512-channel Faraday-strip array detector coupled to an inductively coupled plasma Mattauch-Herzog mass spectrograph. Analytical chemistry, 81(13), 5467-5473. https://doi.org/10.1021/ac900640m