2-(3-チエニル)-3-ヒドロキシ-6-フルオロクロモンを用いるアルミニウムのフローインジェクション分析

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A flow injection system is described for the determination of aluminum. This method is based on the formation of a fluorescent complex with 2-(3-thienyl)-3-hydroxy-6-fluorochromone. The maximum wavelength of its excitation and emission spectra are 408 and 460nm, respectively. A 200μl aliquot of sample solution is injected into a carrier (distilled water), which is pumped at 1.1ml min^<-1>. The reagent solution is prepared by mixing the chromone ethanol solution (1×10^<-4>M) and buffer solution (pH 4.9) in the volume ratio of 10:1. The reagent solution is also pumped at 1.1ml min^<-1>. Aluminum ion in the sample solution reacts with chromone in the coil (0.5mm i.d. x 1m) to form a fluorescent complex. A linear relationship was observed between peak heights and aluminum concentrations in the range of 1.4-100ng ml^<-1> A routine sampling rate of 40 determinations per hour can be achieved by the proposed method.
2006-01-31