摘要
基于锰（Ⅶ）氧化Ⅰ－离子产生Ⅰ３－配阴离子，再利用Ⅰ３－与罗丹明Ｂ阳离子之间的离子缔合反应，发展了一种测定锰的新分光光度法。显色反应系在聚乙烯醇存在下的磷酸介质中进行。由于氧化－还原反应的倍增作用和染料阳离子的高摩尔吸光系数，使显色反应具有极高的灵敏度，ε值达１．９×１０５Ｌ·ｍｏｌ（－１）·ｃｍ（－１）。方法也具有较好的选择性，可用于某些样品中痕量锰的测定。
A new spectrophotometric method for the determination of manganese has been developed based on the manganese(Ⅶ) oxidating the I - to form I3-,then I3-reacts to form an ionassociate with rhodamine B.The medum of the colour reaction is a phosphoric acid solution in the presence of PVA.The method has very high sensitivity due to the multiplication function of the oxidation-reduction and a high molar absorptivity of the basic dye, its ε value is 1.9×105L·mol-1·cm-1.The method has fairly selectity and can be applied to determination of manganese in some materials.
出处
《冶金分析》
CAS
CSCD
北大核心
1994年第6期13-17,共5页
Metallurgical Analysis
基金
国家自然科学基金
