Arsine and selenium hydride trapping in a novel quartz device for atomic-absorption spectrometry |
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Authors: | Jan Kratzer Ji?i Dědina |
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Institution: | (1) Academy of Sciences of the Czech Republic, Institute of Analytical Chemistry, Laboratory of Trace Element Analysis, Vídeňská 1083, 142 20 Prague, Czech Republic |
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Abstract: | A novel quartz device has been designed to trap arsine and selenium hydride and subsequently to volatilize the collected analyte
and atomize it for atomic-absorption spectrometric detection. The device is actually the multiple microflame quartz-tube atomizer
(multiatomizer) with inlet arm modified to serve as the trap and to accommodate the oxygen-delivery capillary used to combust
hydrogen during the trapping step. The effect of relevant experimental conditions (trap temperature during trapping and hydrogen
flow rate and trap temperature during volatilization) on collection and volatilization efficiency was investigated. Under
the optimum conditions collection and volatilization efficiency for arsenic and selenium were 50 and 70%, respectively.
![MediaObjects/216_2006_1048_Figa_HTML.gif](/content/v081387862157024/MediaObjects/216_2006_1048_Figa_HTML.gif) |
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Keywords: | Arsenic and selenium hydrides Atomic-absorption spectrometry Multiatomizer Hydride-trapping optimization Quartz surface |
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