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铀(Ⅵ)偶氮胂Ⅲ络合物溶液是在十二烷基辛基甲基苄基氨化铵存在条件下,用氯仿、甲苯、1,2-二氯代乙烷及丁醇等萃取。用氯仿萃取的络合物组成为1:1,最大吸收处的波长为655mμ,克分子消光系数为5.6×10~4。应用上述萃取法的条件:pH0.8—1.2,偶氮胂Ⅲ浓度为1.50×10~(-4)M,萃取剂为5%的十二烷基辛基甲基苄基氯化铵的氯仿溶液。铀(Ⅵ)在有机相的浓度为0.2—1.2×10~(-5)M 时,符合比耳定律。Ni(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)、Mn(Ⅱ)、Cd(Ⅱ)、Al(Ⅲ)、Cr(Ⅲ)、Fe(Ⅲ)、Zr(Ⅳ)、V(Ⅴ)、W(Ⅵ)等离子存在时,影响很小。Th(Ⅳ)对 U(Ⅵ)的萃取有影响。但本萃取法的灵敏度比萨文利用二苯胍盐的丁醇萃取法大约提高了一倍。
Uranium (Ⅵ) arsenazo Ⅲ complex solution is dodecyloctyl benzyl ammonium chloride in the presence of chloroform, toluene, 1,2-dichloroethane and butanol extraction . The complex extracted with chloroform had a composition of 1: 1, a wavelength of maximum absorption of 655 mμ and a molar extinction coefficient of 5.6 × 10 -4. The conditions of the above extraction method are as follows: pH 0.8-1.2, arsenazo Ⅲ concentration 1.50 × 10 -4 M, extraction agent 5% dodecyloctyl methyl benzyl ammonium chloride in chloroform Solution. Uranium (Ⅵ) complies with Beer’s law when the concentration of organic phase is 0.2-1.2 × 10 -5 M. The Ni (Ⅱ), Cu (Ⅱ), Zn (Ⅱ), Mn (Ⅱ), Cd (Ⅱ), Al Ⅲ, Cr Ⅲ, Fe Ⅲ, Zr Ⅳ and V V, In the presence of W (VI) plasma, the effect is small. Th (Ⅳ) has an influence on the extraction of U (Ⅵ). However, the sensitivity of the extraction method than Savarin diphenyl guanidine salt butanol extraction method approximately doubled.