アルミニウム-シッフ塩基錯体の安定化効果を利用するマロン酸イオンのフローインジェクション蛍光定量

概要

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Salicylaldehyde reacts with a large excess of ethylenediamine to form N-salicylidene-ethylenediamine (SED). In the presence of malonate ion, SED reacted with aluminium to form a ternary fluorescent aluminium-Schiff base complex. The fluorescent determination of malonate ions using this reaction by triple-channel FIA was investigated. The fluorescence intensities of this complex were proportional to the concentration of malonate ions ; the malonate ions in the sample solution were calculated based on the fluorescence peak height. The malonate ions could be selectively determined over the range 0.15〜20 ppm ; 40 samples could be analyzed per hour. The proposed method was applied to determine the malonate in an alkaline solution of barbituric acid. Furthermore, a simultaneous determination of the malonate ion and the oxalate ion was investigated by the addition of calcium chloride. Each concentration of malonate and oxalate ions could be calculated based on the decrease of the peak height in the presence of calcium.
社団法人日本分析化学会の論文
1993-09-05