催化光度法测定粮食中的痕量锰  

Catalytic spectrophotometric determination of trace manganese in grain

作　　者：赵文革[1] 吕运开[1] 王春[1] 

机构地区：[1]河北大学化学系,保定071002

出　　处：《分析试验室》2001年第4期73-75,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了测定痕量锰的新催化光度法 ,方法基于氨三乙酸为活化剂 ,锰( )催化高碘酸钾氧化溴酚蓝的反应。测定锰的线性范围为 0 .4～ 1 0 ng/ m L,检出限为 0 .0 82 ng/ m L,对于 4.0 ng/ m L Mn( )的测定 ,相对标准偏差为3.4% ( n=9) ,其方法已用于粮食中锰的测定。A new catalytic spectrophotometric method for determination of trace Mn(Ⅱ) was developed. The method is based on the catalysis of Mn(Ⅱ) on the oxidation of bromophenol blue by potassium periodate in the presense of nitrilotriacetic acid as an activator. The linear range of the determination is 0.4～10 ng/mL for Mn(Ⅱ) with detection limit of 0.082 ng/mL. The relative standard deviation for determination of 4 0 ng/mL Mn(Ⅱ) is 3.4% ( n =9). The method was applied to the determination of trace Mn(Ⅱ) in grain.

关 键 词：催化光度法 溴酚蓝 高碘酸钾 氨三乙酸 粮食 测定 痕量分析 

分 类 号：TS211.7[轻工技术与工程—粮食、油脂及植物蛋白工程]