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A novel pervaporation-flow injection (PFI) system for the determination of As(III) in aqueous samples at μgl -1 level is described. The analytical procedure involved stopping the acceptor stream and injecting acidified As(III) samples into a 0.3M HCl stream which was mixed with a 0.14M sodium borohydride in 0.025M NaOH stream. The arsine generated was transported in the pervaporation...
A pervaporation-flow injection system for the determination of As(III) by the molybdenum blue method is described. Samples containing As(V) were pretreated with KI and HCl prior to injection to reduce As(V) to As(III). As(III) samples were injected into a 0.5M HNO 3 stream and then mixed with a stream containing 0.5% sodium borohydride. The arsine generated was transported in the pervaporation...
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