阻抑高碘酸钠氧化铬天青B褪色光度法测定痕量钛  

Determination of Trace Titanium by Inhibitory Oxidation Eriochrome Azurol B with NaIO_4 Discoloring Spectrophotometry

作　　者：黄森科[1] 

机构地区：[1]漳州师范学院化学系,福建省漳州市363000

出　　处：《光谱实验室》2002年第6期787-789,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：基于加热和 NH3- NH4 Cl(p H=10 .2 0 )缓冲溶液存在下 ,痕量钛 ( )能阻抑高碘酸钠氧化铬天青 B的褪色反应 ,建立了阻抑高碘酸钠氧化铬天青 B褪色光度法测定痕量钛 ( )的新方法。该方法的线性范围为 0— 4 0 .0 ng/ m L Ti( ) ,检出限为 5 .85× 10 - 1 0 g/ m L ,用于鲍鱼壳中痕量钛的测定 。A discoloring spectrophotometry method for the determination of trace titanium(Ⅳ) has been established based on its inhibitory effect on the oxidation discoloration rection of eriochrome azurol B by NaIO 4 by heating in the presence of NH 3 NH 4Cl(pH =10.20). Beers law is obeyed in the concentration range of 0-40.0ng/mL Ti(Ⅳ), the detection limit is 5.85×10 -10 g/mL. The method has been applied to determine trace titanium in the shells of abalone with satisfactory results.

关 键 词：高碘酸钠 氧化 测定 钛 铬天青B 阻抑褪色光度法 痕量分析 鲍鱼壳 

分 类 号：O614.411[理学—无机化学] O65[理学—化学]