Determination of (Ultra)trace Amounts of Arsenic(III) and Arsenic(V) in Water by Inductively Coupled Plasma Mass Spectrometry Coupled with Flow Injection On-Line Sorption Preconcentration and Separation in a Knotted Reactor

摘要: A method has been developed for determination of (ultra)trace amounts As(III) and As(V) in water by flow injection on-line sorption preconcentration separation coupled with inductively plasma mass spectrometry (ICPMS) using a knotted reactor (KR). The was achieved selective formation the As(III)−pyrrolidine dithiocarbamate complex over sample acidity range 0.01−0.7 mol L-1 HNO3, its adsorption onto inner walls KR made from 150-cm-long, 0.5-mm-i.d. PTFE tubing, elution 1 detection ICPMS. Total inorganic arsenic determined after prereduction to 1% (m/v) l-cysteine−0.03 HNO3 media. concentration calculated difference (the total As(III)). Owing group-specific character chelating agent, use an efficient rinsing step before elution, interferences encountered conventional ICPMS common major matrix, alkali alkal...