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本文研究了1,10-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)癸二酮-〔1,10〕(H_2A)在硝酸中萃取钒(V)的机理。测得萃合物的组成为 VO_2·HA,计算了萃取平衡常数。当有正丁醇存在时,由于溶剂化萃合物 VO_2·HA·C_4H_9OH 的生成,使 H_2A 对钒(V)的萃取速度加快,萃取率也有较大提高,萃取平衡常数也较无含氧溶剂存在时大几个数量级。在有机相中的萃合物呈红色,据此,建立了新的萃取光度法测定微量钒(V)。讨论了含氧溶剂对显色体系的增敏作用。
In this paper, the extraction of 1,10-bis (1’-phenyl-3’-methyl-5’-oxopyrazol-4’-yl) decadione [1,10] Vanadium (V) mechanism. The composition of the extract was measured as VO_2 · HA, and the extraction equilibrium constant was calculated. When n-butanol is present, the extraction rate of vanadium (V) increases due to the formation of VO_2 · HA · C_4H_9OH, and the extraction rate also increases greatly. The extraction equilibrium constant is also better than that of non-oxygenated solvent When there are several orders of magnitude. In the organic phase of the extract was red, thus, the establishment of a new extraction spectrophotometric determination of trace vanadium (V). The sensitizing effect of oxygenated solvents on the color system was discussed.