铟（Ⅲ）－钼酸铵－罗丹明B显色反应体系的研究及其应用  

Study on the Colour Reaction of Indium (Ⅲ)-Molybdate-Rhodamine B System and its Application

作　　者：程光祥[1] 李祖碧[1] 王加林[1] 徐其亨[1] 

机构地区：[1]云南大学成人教育学院,云南大学化学系

出　　处：《云南化工》1996年第3期37-39,共3页Yunnan Chemical Technology

摘　　要：铟（Ⅲ）与钼酸铵和罗丹明Ｂ在ＰＶＡ存在下的酸性水溶液中形成离子缔合物而产生显色反应，该体系的灵敏度高，摩尔吸光系数ε＝２．４４×１０５Ｌ·ｍｏｌ－１ｃｍ－１，离子缔合物稳定性好，至少稳定４８ｈ。研究了显色体系的光度特性和３０多种共存离子的影响，该法应用于纯锡中痕量铟的测定，结果满意。The colour reaction based on indium (Ⅲ)with molybdate and Rhodamine B to form ion-associate complex in the presence of PVA.Its apparent molar absorptivity is 2. 44×105 L. mol-1.cm-1 at 585 nm. Its sensitivity and stability are excellent. The ion-associate complex was stable for at least 48h. The optimum Conditions were described. The influence of over 30 foreign ions on the edtermination was examined. The method was used for the detemination of trace amount indium(Ⅲ)in pure Tin samples with satisfactory results.

关 键 词：铟 钼酸铵 罗丹明B 光度法 显色反应 测定 

分 类 号：O614.372[理学—无机化学] O657.99[理学—化学]