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近场激光热透镜光谱分析法测定铌 被引量:4

Determination of niobium by near field laser thermal lens spectrometry
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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.
机构地区 西北大学化学系
出处 《分析试验室》 CAS CSCD 北大核心 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)
关键词 激光热透镜光谱分析法 测定 2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚 铌矿样 Thermal lens spectrometry Niobium 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol
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