催化光度法测定痕量锌  

Catalytic Spectrophotometric Determination of Trace Zinc

作　　者：黄燕玲[1] 黄典文[1] 郭洁茹[1] 

机构地区：[1]广东工业大学化学工程系,广东广州510090

出　　处：《广东工业大学学报》2000年第1期79-81,共3页Journal of Guangdong University of Technology

摘　　要：研究了在稀硫酸介质中 ,Zn2 + 催化过氧化氢氧化邻苯三酚红的褪色指示反应 ,建立了测量痕量锌的新方法 ,Zn2 + 的检测限质量浓度为 5 38× 10 - 11g/mL ,线性范围为 0～ 1 92× 10 - 2 μg/mL ,该法用于测定头发中痕量锌 。A new method to determine trace Zn 2+ is formed according to the decolorizing reaction catalyzed by Zn 2+ which results from the oxidation of pyrogallol sulphonphthalein by hydrogen peroxide in H 2SO 4 medium.The decrease in color is directly proportroned to the amount of Zn 2+ .The method is highly sensitive with the minimum quantitative determination being 5.38×10 11 g/mL.The linear respondence ranges between 0 to 1.92×10 -2 μg/mL.The method has been used to determine trace Zn 2+ in hair with satisfactory results.

关 键 词：锌 邻苯三酚红 过氧化氢 催化光度法 测定 

分 类 号：O614.241[理学—无机化学] O657.32[理学—化学]