摘要
在稀H2SO4介质中,铌灵敏催化KBrO3氧化偶氮氯膦 mA的褪色反应,据此建立了催化动力学光度法测定铌的新方法。线性范围为5～30ng mL,检出限0.292ng mL。本法已用于矿石试样中微量铌的测定。
A new catalytic method for the determination of trace niobium was developed with spectrophotometry. It was based on the catalytic effect of Nb(Ⅴ) on the oxidation of chlorophosponazo-mA by potassium bromate in sulphuric acid medium. The linear range of (Nb(Ⅴ)) was 5～30 ng/mL, and the detection limit was 0.292 (ng/mL). The method was applied to the determination of niobium in ore samples with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2004年第8期69-71,共3页
Chinese Journal of Analysis Laboratory
关键词
铌
催化动力学光度法
偶氮氯膦-MA
Niobium
Catalytic kinetic spectrophotometry
Chlorophosponazo-mA
