摘要
系统地研究了金（Ⅲ）与ｍｅｓｏ－四（４－吡啶基）卟啉（ＴＰｙＰ）荧光熄灭反应。在０．２～０．５ｍｏｌ／Ｌ硫酸介质中，沸水加热该反应即可完成，金（Ⅲ）浓度在０～８×１０＾－６ｇ／２５ｍＬ范围内与荧光强度变化值△Ｆ有良好的线性关系。用摩尔比法和连续变化法测定金（Ⅲ）与ＴＰｙＰ组成比为２：１。本法不需要辅助络合剂，操作简便，用于矿石中金含量的测定，与标准对照，结果吻合。
A fluorescence quenching method is presented based on the complex formation of Au(Ⅲ) withmeso-tetrakis- (4 pyridyl ) porphyrin 0. 2 ~ 0. 5 mol/ L sulfuric acid medium. A linearity relationship is shown in the rangeof 0~ 320 μg/L. Most other coexisted ions do not interfere with the determination of Au(Ⅲ) using the active coaladsorption separation. This method has the advantage of high sensitivity and selectivity. It has beenapplied to determine trace gold in ores with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2000年第4期455-457,共3页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金
