光度法测定Ti(lv)与某些羟基羧酸络合物的组成与稳定常数

• 作 者: 张启超 代大煜 唐昌敏
• 机 构: 重庆大学钛化学研究室,重庆大学钛化学研究室,重庆大学钛化学研究室
• 出 处: 重庆大学学报(自然科学版)
• 发表日期: 1983年01期
• 关键词: 络合物 Ti lv 稳定常数 柠檬酸 酒石酸 光度 羟基羧酸 平衡移动法 分光光度法

本文用分光光度法研究了钛(Ⅳ)—磺基水物酸—柠檬酸/酒石酸/苹果酸竞争体系中络合物的形成。测定了柠檬酸钛、酒石酸钛、苹果酸钛络合物的组成及稳定常数。结果表明:在PH3.7时、钛(Ⅳ)与柠檬酸形成1:1无色络合物,其lgβ_1=9.95(±0.04),钛(Ⅳ)与酒石酸形成两种无色络合物,其组成比分别为1:1和1:2,lgβ_1=7.81(±0.03),lgβ_2=10.35在PH3.5时,钛(Ⅳ)与苹果酸形成1:1无色络合物,其lgβ_1=8.49(±0.04)并用金属指示法等对结果进行了验证。

In this paper, the formation of complex of titanium (Ⅳ) -sulfosalicylic acid-citric acid / tartaric acid / malic acid competition system was studied by spectrophotometry. The composition and stability constants of titanium citrate, titanium tartrate and titanium malate were determined. The results showed that at pH 3.7, titanium (Ⅳ) formed a 1: 1 colorless complex with citric acid with lgβ_1 = 9.95 (± 0.04). Titanium (Ⅳ) formed two colorless complexes with tartaric acid, The composition ratio of 1: 1 and 1: 2, lgβ_1 = 7.81 (± 0.03), lgβ_2 = 10.35 at PH 3.5, titanium (Ⅳ) and malic acid to form a 1: 1 colorless complex, the lgβ_1 = 8.49 (± 0.04) and the results were verified by metal method and the like.