Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Original Papers
Effect of Di-2-ethylhexyl Sodium Sulfosuccinate Reversed Micelles on the Iron-Tetrasulfonatophthalocyanine-Catalyzed Fluorogenic Oxidation Reaction of L-Tyrosine with Hydrogen Peroxide
Ling WEIXiao-Lan CHENHuang-Hao YANGJin-Gou XU
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2002 Volume 18 Issue 5 Pages 585-589


The catalytic behavior of iron tetrasulfonatophthalocyanine (FeTSPc) for the oxidation reaction of L-tyrosine with H2O2 in a di-2-ethylhexyl sodium sulfosuccinate (AOT) reversed-micellar system (AOT/cyclohexane) was studied. It was indicated that the reversed micelles could not only enhance the catalytic activity of FeTSPc, but could also increase the fluorescence intensity of the product. Factors that may influence the catalytic reaction, including the concentration of AOT, the cosolubilized water, temperature and pH, were further examined. The possibility of its analytical application was also tested. Experimental results show that the calibration graphs for the determinations of FeTSPc and H2O2 under optimum conditions are linear over the range of 1.0 × 10-8 - 1.0 × 10-6 mol L-1 and 0.0 - 3.0 × 10-6 mol L-1, respectively, with detection limits of 1.1 × 10-9 mol L-1 and 3.1 × 10-9 mol L-1 for FeTSPc and H2O2, respectively.

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© 2002 by The Japan Society for Analytical Chemistry
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