Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2495
AuthorsSortino, F.* 
Nonell, A.* 
Toutain, J. P.* 
Munoz, M.* 
Valladon, M.* 
Volpicelli, G.* 
TitleA new method for sampling fumarolic gases: analysis of major, minor and metallic trace elements with ammonia solutions
Issue Date2006
Series/Report no./ 158 (2006)
DOI10.1016/j.jvolgeores.2006.05.005
URIhttp://hdl.handle.net/2122/2495
Keywordslcanic gas; sampling
acid gases
noncondensible gases
metallic trace elements
Subject Classification04. Solid Earth::04.04. Geology::04.04.11. Instruments and techniques 
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry 
AbstractA new method using ammonia solutions in pre-evacuated quartz bottles has been experimented for volcanic gas sampling and analysing. Various tests (reproducibility, variability and comparison with known methods such as NaOH pre-evacuated bottles and acid condensates) have been performed to check for their efficiency. By using ammonia solutions, acid gases (St, HCl, HF), carbon dioxide, noncondensible gases (N2, Ar, …) and metallic trace elements (MTE) can be measured with standard methods (HPLC, GC, titrimetry, ICP-MS). Results showthat acid gases, CO2 and noncondensible gases are sampled and analysedwith similar efficiency inNH4OHbottles than by using the known and accurate NaOH method.Moreover, a key point is that NH4OH solutions, after undergoing adequate processing (oxidation and acidification) allow also precise MTE measurements by using standard ICP-MS methods. Such MTE measurements appear much more reliable than those performed on acid condensates. Pre-evacuated ammonia bottles appear therefore as an optimum tool to collect volcanic gases and to obtain their complete chemical composition.
Appears in Collections:Papers Published / Papers in press

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