Adrien Mestrot IJA-CSIC-UB

Speciation analysis:Trapping 50 ng of each compound onto different traps andanalysis using HPLC ICP-MS, addition of 100 µL ofconcentrated H 2 0 2 .Speciation on a trap loadedwith the four arsine speciesMethod used:0.010HPLC (anion exchangeHamilton PRP X 100)Phosphate buffer (pH 6.2)Flow rate 1.0 ml/minICP-MSCPS As/RhGood separation0.0080.0060.0040.0020.000All four speciestrapped and eluted.(CH 3) 3Asas TMAO(CH 3) 2AsHas DMAATime (s)(CH 3)AsH 2as MMAAAsH 3as As(V)0 200 400 600 800 1000