アルミニウム-クペレートとのイオン交換抽出によるバナジウム(V)の吸光光度定量

概要

論文の詳細を見る
Vanadium(V) was determined by the ion-exchange extraction with aluminum cupferrate in chloroform. Ethanol was added for promoting the extraction of vanadium(V). After (50〜90)cm^3 of a sample solution containing less than 80μg of vanadium(V) was taken in a separatory funnel, 5cm^3 of 1mol dm^<-3> monochloroacetate buffer solution (pH 2.2) and 10.0cm^3 of 0.005mol dm^<-3> aluminum cupferrate in chloroform-ethanol(1+1) were added. The mixture was shaken for 5 minutes, and the absorbance of chloroform phase was measured at 400nm against the reagent blank. Under the optimum condition, the relation-ship, y=0.013_0x was obtained between y of the absorbance and x(μg) of the amounts of vanadium(V) in test solution within the range 5〓x〓80. Common cations and anions did not interfere. Iron(III) that interfered the determination could be removed by the extraction with cupferron and chloroform in the presence of hydrogen peroxide as amasking agent for vanadium(V). After hydrogen peroxide as decomposed by adding potassium permanganate, vanadium(V) was determined as described above. About (0.002〜0.03)% of vanadium in aluminum metals could be determined without separation from the matrices.
社団法人日本分析化学会の論文
1978-06-05