近场激光热透镜光谱分析法测定铌  

Determination of niobium by near field laser thermal lens spectrometry

作　　者：韩权[1] 阎宏涛[1] 洪波[1] 

机构地区：[1]西北大学化学系,西安710069

出　　处：《分析试验室》2003年第4期11-13,共3页Chinese Journal of Analysis Laboratory

基　　金：陕西省自然科学基金资助项目(99H07)

摘　　要：采用氦 氖激光器(632.8nm)观测了铌(V)与2 (5 溴 2 吡啶偶氮) 5 二乙氨基苯酚(5 Br PADAP)和酒石酸所形成的紫蓝色三元配合物的激光热透镜效应,建立了近场激光热透镜光谱分析法测定铌的新方法。铌(V)质量浓度在0～500ng/mL范围内与热透镜信号强度呈良好的线性关系,检出限为5ng/mL。该方法已应用于钢样及铌矿样中铌的测定。A new method for determination of niobium by near field laser thermal lens spectrometry was developed. It was based on the reaction of niobium with 2(5bromo2pyridylazo)5diethylaminophenol (5BrPADAP) and tartaric acid to form a ternary complex with absorption maximum at 610 nm. The linear range was 0～500 ng/mL of niobium for the determination with detection limit of 5 ng/mL. The method was applied to niobium determination in standard steel samples and niobium ore samples.

关 键 词：激光热透镜光谱分析法 测定 铌 2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚 铌矿样 

分 类 号：P618.79[天文地球—矿床学] P575.4[天文地球—地质学]