NDLI: Examination of separation efficiencies of mercury vapour for different gas–liquid separators in flow injection cold vapour atomic absorption spectrometry with amalgam preconcentration

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Back matter

Journal of Analytical Atomic Spectrometry Vol - 8 Issue - 3

Journal of Analytical Atomic Spectrometry Vol - 8 Issue - 2

Journal of Analytical Atomic Spectrometry Vol - 8 Issue - 1

Journal of Analytical Atomic Spectrometry Vol -7

Journal of Analytical Atomic Spectrometry Vol -6

Journal of Analytical Atomic Spectrometry Vol -5

Journal of Analytical Atomic Spectrometry Vol -4

Journal of Analytical Atomic Spectrometry Vol -2

Examination of separation efficiencies of mercury vapour for different gas–liquid separators in flow injection cold vapour atomic absorption spectrometry with amalgam preconcentration

Content Provider	Royal Society of Chemistry (RSC)
Author	Tyson, J. F. McIntosh, S. Haigh, P. E. Hanna, C. P.
Copyright Year	1993
Abstract	A comparison has been made of the separation efficiency of three designs of gas–liquid separator when used in a flow injection (Fl) manifold for the determination of Hg by cold vapour atomic absorption spectrometry. The manifold used with each device was separately optimized for maximum sensitivity. This involved studies of the effects of reagent flow rates, argon purge gas flow rate, injection time and post-injection purge time. A significant difference, with respect to both peak height and integrated signal sensitivity (by a factor of approximately 3) between the performance of a miniature design and that of two larger volume designs was obtained. No significant differences in precisions were observed. For the miniature design, the use of either tetrahydroborate or tin(II) reductant was investigated. No difference in peak height sensitivity was found, but the integrated signal sensitivity for the tetrahydroborate was 36% lower. The efficiency of separation was measured by comparison of the signal obtained from a known mass of Hg vapour, introduced via an amalgam preconcentration unit, and the signal obtained from a known mass of Hg in solution, introduced via the Fl manifold and amalgam preconcentration unit. The efficiencies were found to be 101 ± 4% and 103 ± 6% for peak height and integrated signal, respectively.
Starting Page	585
Ending Page	590
Page Count	6
File Format	PDF
ISSN	02679477
Volume Number	8
Issue Number	4
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/JA9930800585
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Fl Vapor\u2013liquid separator Manifold Absorption spectroscopy Reagent Argon Borohydride Tin
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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