アルギン酸固定化水和酸化チタンへの各種リン酸イオンの吸着

概要

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The adsorption of various phosphorus oxoanions on titanium oxide treated with alginate was investigated by capillary-type isotachophoresis. The various phosphorus oxoacid anions such as orthophosphate (P_1 ), phosphite (P^3), hypophosphite (P^1), diphosphate (P_2) and triphosphate (P_3) ions were separated at pH 4.0 with a 0.01 M histidine hydrochloride-0.075% triton X-100 mixture as the leading electrolyte and 0.01 M hexanoic acid as the terminating electrolyte. The PU (potential unit) value increased in the order P_3<P_2<P^1<P^3<P_1. The calibration curves for P_1,P^3 and P_1,P^2 and P_3 were linear in the range of 10〜120,10〜80 and 10〜50 μmol, respectively. The relative standard deviation for the measured phosphorus oxoacid anions were less than 5% (n=5). The maximum amounts adsorbed on the titanium oxide treated with alginate (μmol g^<-1>) of P_1,P^3,P^1,P_2 and P_3 by stirring (500 rpm) for 5 h (the amount of P_1 reached the maximum after 1.5 h and subsequently decreased little by little) at pH 1.6 were 320,270,180,140 and 90,respectively.
社団法人日本分析化学会の論文
1996-12-05