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- W2367701362 abstract "A synchronous fluorescence spectrometry combined with first order derivative treatment was deve-loped for the simultaneous determination of methylene blue(MB)and azure A(AA).The method is based upon the formation of ion-association complexes of AuCl-4 with MB and AA,and the solvent extraction of two complexes by 1,2-dichloroethane in an aciditive medium.When [MB][AuCl4]3 and [AA][AuCl4]2 complexes were synchronously scanned at Δλ=20 nm and treated with first order derivative techniques in organic phase,the derivative-synchronous fluorescence peaks appeared at 683 nm for [MB][AuCl4]3 and at 608 nm for [AA][AuCl4]2,respectively.The fluorescence intensities were directly proportional to the concentrations of MB at 683 nm and AA at 608 nm within a certain range.So,a simple,sensitive method has been developed for the simultaneous determination of MB and AA.The detection limit(3σ)and linear range were 7.90×10-9 g/mL and 3.0×10-8~4.80×10-6 g/mL for MB,1.78×10-8 g/mL and 6.0×10-8~5.80×10-6 g/mL for AA,respectively.In this work,the spectral characteristics and compostion of ion-association complexes,the optimum conditions and the influences on the reaction system were investigated.The method can be applied to the simultaneous determination of AA and MB in urine samples and in Azure II with satisfactory results." @default.
- W2367701362 created "2016-06-24" @default.
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- W2367701362 date "2009-01-01" @default.
- W2367701362 modified "2023-09-25" @default.
- W2367701362 title "Solvent Extraction & Derivative-synchronous Fluorescence Spectrometry on Simultaneous Determination of Methylene Blue and Azure A in Ion-association Complex Form with AuCl_4~-" @default.
- W2367701362 hasPublicationYear "2009" @default.
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