Analysis of salicylic acid based on the fluorescence enhancement of the As(III)-salicylic acid system [An article from: Analytica Chimica Acta]

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Description:
A new, simple and sensitive spectrofluorimetric method for the determination of salicylic acid (@l"e"x=315nm, @l"e"m=408nm) using As(III) as a sensitizing reagent has been investigated by measuring the increase of fluorescence intensity of salicylic acid due to the complexation of As(III)-salicylic acid in presence of sodium dodecyl sulfate (SDS) 10^-^3M. Under optimum conditions, a significant relationship was obtained between the fluorescence intensity and salicylic acid concentration. A linear calibration curve was obtained in the range 13.8-13812@mgl^-^1 with product-moment correlation coefficient (R) 0.99985 and detection limit 4.2@mgl^-^1. The R.S.D. is 2.35% (n=5).The method was applied successfully to the determination of salicylic acid in human serum.