摘要
研究了聚乙烯醇（ＰＶＡ）存在下铑（Ⅲ）—钼酸盐—乙基罗丹明Ｂ（ＥＲＢ）的显色体系。在高氯酸介质中该体系λｍａｘ＝５７５ｎｍ，表观摩尔吸光系数ε值为６６９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，符合比耳定律范围０～２０μｇ／２５ｍＬ，摩尔比ＲＨ：ＥＲＢ＝１∶４，离子缔合物至少稳定４８ｈ。考察了４０多种共存离子的影响，大多数离子不干扰。本法已用于回收液中铑的测定。
The chromogenic system of Rh(Ⅲ)-molybate-ethyl rhodamine B in the presence of polyvinyl alcohol has been studied. ln the perchloric acid medium,λ max =575nm,apparent molar absorption coefficient is 6 69×10 5 L·mol -1 ·Cm -1 . Bear’s law is obeyed over the range of 0-2 0 mg/25ml. Mol ralio=1∶4. Ionic collector is stable for at least 48h. More than 40 coexisting ions are investigated and most of them are proved to be non-interference.This method is suitable for determination of Rh in restored solutinos
出处
《云南冶金》
1998年第5期48-50,共3页
Yunnan Metallurgy
