锗Ⅳ-酒石酸-苯基荧光酮-表面活性剂胶束混配络合显色反应及其应用

Study on the color reaction of micellar mixed ligand complex of germanium-tartaric acid-phenylfluorone-surfactant and its analytical application

有CTMAB和TritonX 10 0存在下和在pH4 5的NaAc -HAc缓冲介质中 ,Ge 与酒石酸 (Tar)和苯基荧光酮 (PF)形成胶束混合配位络合物 ,在 0 82mol/LHCl介质中 ,络合物至少可稳定 6h。测得络合物组成比为Ge ∶Tar∶PF =1∶2∶2。其最大吸收波长在 5 0 5nm处 ,表观摩尔吸光系数ε =1 2 5× 10 5 ,Ge 量在 0～ 0 5 6mg/L范围符合比尔定律。方法灵敏 ,选择性较高 ,用于烟道灰和锌精矿中微量锗的测定 ,结果满意。

In the HAc-NaAc buffer solution at pH 4.5 and in the presence of CTMAB and TritonX 100, germanium? reacts with tartaric acid (Tar) and phenylfluorone (PF) to form a micellar mixed ligand complex. In the 0.82 mol/L HCl medium, the complex is stable at least for 6h. The composition ratio of Ge?∶Tar∶PF has been found to be 1∶2∶2. The apparent molar absorptivity is 1.25×10 5L·mol -1 · cm -1 at 505nm. Beer's law is obeyed in the range of 0-0.56mg/L for germanium ?. The method is sensitive, selective and has been applied to determine the trace germanium in flue dust and zinc concentrate with satisfactory results.