古今贤文
Solvent Donicity Influence in the Fluorescence
生活委员的职责
Emission of the Lithium/1,4-Dihydroxyanthraquinone System. Improvement in the Quantification of Lithium.
期刊名称： Analytical Letters
作者： Rodríguez, Luis Cuadros,Linares, Carlos Jiménez,Ceba, Manuel Román
孩子腿疼是什么原因
暗示教学年份： 1997年
期号： 第4期
什么叫真分数关键词： Solvent donicity;spectrofluorimetry;1,4-dihydroxyanthraquinone;lithium determination;ion pair
摘要：The fluorescence emission from the lithium/1,4-dihydroxyanthraquinone system shows a great enhancement in the prence of certain water-miscible solvents. This is justified from the donicity (nucleophilic properties) of the solvent that facilitates the solvation of the lithium cation in solution and t
美食胡辣汤he stabilization of an nondissociated ion-pair between the solvated lithium cation and the 1,4-dihydroxyanthraquinonate anion. A very nsitive analytical method was propod for the spectrofluorimetric determination of lithium bad on its reaction with 1,4-dihydroxyanthraquinone (quinizarin) in a dimethylsulfoxide medium (90%) and in prence of sodium hydroxide. The fluorescence is measured at an excitation wavelength of 602 nm and an emission wavelength of 670 nm and it is stable at 25°C at least 6 h. The calibration curve
内容由中国教育图书进出口有限公司引进
>铁树开花吗>新春快乐祝福语
