Adrien Mestrot IJA-CSIC-UB

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ApproachSolid phase chemotrapping onsilver nitrate impregnatedsilica gel, previously used totrap As in natural gas.Quantification and qualification of all 4 arsines– Arsine: AsH 3 ,– Monomethylarsine: CH 3 AsH 2 ,– Dimethylarsine: (CH 3 ) 2 AsH,– Trimethylarsine (TMA): (CH 3 ) 3 As.-using offline hydride generation (HG) on solutions of As(III),monomethylarsenic acid (MMAA), dimethylarsenic acid(DMAA) and spiking of TMA ((CH 3 ) 3 As) solution (in pentane)into Tedlar Bags.Trap the content of the bags and assess recovery
ApproachElutionBoiling HNO 3 orBoiling H 2 O– with hot boiling solution of HNO 3 for totals,– with hot boiling water for speciation,– During trapping/elution process volatilespecies are converted to non volatilespecies.Measurements:– with HG-UV-AFS or ICP-MS for totals,– with HPLC-ICP-MS for speciation.
Page 2: ArsenicUbiquitous naturallyoccurrin
Page 7 and 8: Recovery for totals:140120AsH387.8%
Page 9 and 10: Speciation analysis:Trapping 50 ng
Page 11 and 12: Volatilization measured onnon-spike
Page 13 and 14: Speciation on MesocosmsTMA as (CH 3
Page 17: Thank you for yourattention.We ackn

Adrien Mestrot IJA-CSIC-UB

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