非离子型微乳液介质-天竺牡丹紫催化光度法测定水及土壤中微量锰  

Catalytic Spectrophotometric Determination of Trace Manganese in Water and Soil with Dahlia Violet in Nonionic Microemulsion Medium

作　　者：魏琴[1] 杜斌[2] 吴丹[2] 李超[2] 欧庆瑜[1] 

机构地区：[1]中国科学院兰州化学物理研究所,兰州730000 [2]济南大学化学化工学院,济南250022

出　　处：《分析化学》2003年第8期1000-1003,共4页Chinese Journal of Analytical Chemistry

基　　金：山东省自然科学基金资助项目 (No .Y2 0 0 0B0 9)

摘　　要：研究了以微乳液作为介质 ,在pH 4.5HAc NaAc缓冲溶液中 ,用氨三乙酸作活化剂 ,锰催化高碘酸钾氧化天竺牡丹紫褪色的新指示反应。在 5 80nm处 ,检出限达到 3.8ng L ,线性范围为 0 .4～ 5 .6 μg L。该法用于土壤及水中微量锰的测定 ,相对标准偏差小于 3.6 %,加标回收率在 95 %～ 10 7%范围内 ,取得了令人满意的结果。A new catalytic-kinetic spectrophotometric method for the determination of trace amount of manganese in nonionic microemulsion medium. has been developed. The method is based on the catalytic oxidation of Dahlia violet by potassium periodate with nitrilotriacetic acid as an activator in HAc-NaAc buffer solution (pH 4.5). The linear range is 0.4 similar to 5.6 mug/L at 580 nm. The detection limit is 38 ng/L. The method has been applied to the determination. of manganese in water and soil samples, the relative standard deviation is less than 3.6%, and recovery is 95% similar to 107%. The results are satisfactory.

关 键 词：非离子型微乳液介质 天竺牡丹紫 催化光度法 测定 水 土壤 微量锰 动力学光度法 催化氧化 测定方法 

分 类 号：O657.3[理学—分析化学]