铕─偶氮胂Ⅲ溶液相和树脂相配合物的研究及树脂导数光谱初探

STUDIES ON EUROPIUM-ARSENAZO Ⅲ COORDINATION COMPOUND OF SOLUTION AND RESIN PHASE AND PRILIMINARY RESEARCH FOR DERIVATIVE SPECTRUM OF RESIN COMPOUND

本文研究了－偶氮胂Ⅲ（ＡｒＳⅢ）配合物在溶液中和在离子交换树脂中的形成条件．给出了－ＡｒｓⅢ在溶液中和树脂中各自的吸收光谱，λｍａｘ液＝６５０．３ｎｍ，λｍａｘ树脂＝６６０ｎｍ。在大量硝酸盐存在下，与形成Ｅｕ（ＮＯ３）３），该配阴离子与ＡｒⅢ显色后，能为强碱性阴离子交换树脂吸附，以ＮＯ－３型树脂吸附率高且保持恒定。对溶液相及树脂相配合物的组成研究表明：溶液相Ｅｕ：ＡⅢ＝１：１；树脂相Ｅｕ：ＡｒｓⅢ＝１：６。树脂配合物一阶导数光谱峰位置为：５７６．０（＋）ｎｍ，１．５９９（十）Ｄ１；６５５．２（－１）ｎｍ，２．１１４（－）Ｄ１。

The forming condition of Eu3+--Ars Ⅲ coordination compound in solution and exchanger has been studied.The absorption spectrum of Eu3+--Ars Ⅲ in solution and resin separately has been given,λmaxsolution= 650.3nm.λmaxresin=660nm.In the presence of excessive nitrate.europium reacts with nitrate form a complex anion Eu(NO3),then this anion is colored with arsenazo Ⅲ.it can be absorbed by strong basic anion exchanger,the result of experiments indicate that the absorbability of NO3--type resin is the highest and constant.The composition of coordination compound in solution and resin respectively is Eu: Ars Ⅲ= 1:1(Solution phase and Eu:Ars Ⅲ=1:6(resin phase).Positions of frist derivative spectrum -for resin compoand are 576.0(+)um.1.599(+)D1:655.2(--) urn,2.114 (M) D1.