本文用阳离子交换法研究了低酸度介质中不同温度下UO_2~(2+)-1-酒石酸的络合形成,证明在溶液中存在有UO_2HL~-络离子;较高温度时,还发现存在有[UO_2HL(H_2L)]~(3-)络离子。在25,35,45和55℃时,β_1分别为9.6×10~(-7),5.0×10~(-7),3.4×10~(-7),2.4×10~(-7)。在45,55℃时β_2为2.6×10~(-4),3.1×10~(-3),求得△H(β_1)=-8.7千卡/摩尔,此外,证明了酒石酸异构体的络合能力存在着差异,验证了Fronaeus的观点。 In this paper, the complex formation of UO_2 ~ (2 +) - 1-tartaric acid at different temperatures in a low-acid medium was studied by cation exchange method. It was proved that UO_2HL ~ - complex ions existed in the solution. At higher temperature, [UO_2HL (H_2L)] ~ (3-) complex ions. At 25, 35, 45 and 55 ℃, β_1 were 9.6 × 10 -7, 5.0 × 10 -7, 3.4 × 10 -7 and 2.4 × 10 -7, respectively. At 45 and 55 ℃, β_2 was 2.6 × 10 -4 and 3.1 × 10 -3, and ΔH (β_1) = -8.7 kcal / mol was obtained. Furthermore, it was proved that tartaric acid isomers There are differences in the ability to complex, validated Fronaeus’s point of view.