A method of naked-eye detection for trace arsenic in aqueous samples has been newly developed. The proposed method is based on the formation of hetero poly acid in a solid polymer phase. The intensity of the color of the material changes corresponding to the concentration of arsenic(V) in the sample solutions. The detection limit of this method is 5x10-8 mol dm-3 by the combined use of a preconcentration method. Since the development of the color occurs within 30 min, this system leads a simple, rapid and low-cost detection method of trace arsenic(V) in an aqueous media.
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A color change of a chromogenic material with the different concentrations of arsenic(V). [As(V)]
= 0ppb, 75ppb, 750, ppb, 1.5ppm, 7.5ppm, 15ppm, from left to right
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| Relational Information |
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AIST Today Vol. 4, No.2 (2004) 16
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No.12 Spring 2004
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