摘要
研究了在ＨＡｃ－ＮａＡｃ缓冲溶液中，用氨三乙酸作活化剂，锰催化高碘酸钾氧化维多利亚蓝Ｂ褪色的新指示反应。在６２０ｎｍ处，检出限达到１．４０×１０－１０ｇ／ｍＬ，线性范围为０．１０—０．３５μｇ／２５ｍＬ。该法用于环境样品中微量锰的测定，相对标准偏差小于３．７％。
A new catalytic kinetic spectrophotometric method was established for the determination of trace amount of manganese. The method was based on the catalytic oxidation of Victoria blue B by potassium periodate with nitrilotriacetic acid as an activator in HAc_NaAc medium. The linear ranges were within 0.01—0.35 μg/25mL at 620 nm. The detection limit was 1.40×10-10g/mL. A satisfactory result was obtained when the developed method was used to determinate manganese in environmental samples. The relative standard deviation was less than 3.7%, and the recovery was 90%— 115%.
出处
《农业环境保护》
CSCD
1998年第3期120-123,共4页
Agro-Environmental Protection
基金
山东大学胶体与界面化学国家教委开放实验室基金
关键词
催化氧化
动力学
光度法
环境样品
环境监测
manganese
catalytic-oxidation
kinetic spectrophotometry
Victoria blue B
