Application of direct analysis in real time to a multiphase chemical system : identification of polymeric arsanes generated by reduction of monomethylarsenate with sodium tetrahydroborate

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DOIResolve DOI: http://doi.org/10.1016/j.ijms.2014.07.048
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TypeArticle
Journal titleInternational Journal of Mass Spectrometry
ISSN1387-3806
Volume371
Pages4246; # of pages: 5
AbstractDirect analysis in real time (DART) has been applied in conjunction with high-resolution Orbitrap mass spectrometry to characterize the aqueous reduction of monomethylarsenate by tetrahydroborate (B/As molar ratio ≈ 4 mol/mol). Under these conditions, the reaction gives rise to a complex mixture of arsenic compounds which result in the formation of a reddish precipitate. The use of the DART revealed the presence of a number of polymeric arsanes - up to eight arsenic atoms - associated with the liquid/solid phase of this reaction system. From a reactivity point-of-view, these polymers exhibit an uncommon ionization pathway. In fact, similar to the alkanes, the action of the DART results in the generation of [M - H]+ ions. Furthermore, for each oligomer MeHAs-(AsMe)n-AsHMe (n = 0-8), a series of oxidation products [(M + nO) - H]+ were also identified and their formation has been discussed.
Publication date
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21272930
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Record identifierb2cf5a0f-d84f-4227-a16a-fc05178fd6e0
Record created2014-12-03
Record modified2016-05-09
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