摘要
研究在pH值约为10-0 的Na2B4O7NaOH 介质中,Mn( Ⅱ)对高碘酸钾氧化偶氮胂M 褪色的指示反应催化作用及其动力学条件,以此为依据建立一种高灵敏、高选择性测定痕量Mn( Ⅱ) 的新方法,可测0 .02 ~0.12 mg/L范围的Mn( Ⅱ) ,其测定波长为550 nm .该法简便,分析费用低,检测限为4-45 ×10- 7 g/L.可用于铁合金中痕量Mn( Ⅱ) 的测定.
A method was investigated for the determination of trace manganese(Ⅱ) which can catalyze the discoloring reaction of potassium periodate to oxidize arsenazo M in Na\-2B\-4O\-7 NaOH solution,and the kinetic condition was also discussed.The method has high sensitivity and selectivity for determining trace manganese(Ⅱ) in samples.The rang of determination is 0.02~0.12 mg/L,the detection wavelength is 550 nm and the detection limit is 4.45×10\+\{-7\}g/L.The method is characterized by its simplicity and small expense,and may be used to determine trace Mn(Ⅱ) in ferroalloys.
出处
《沈阳化工学院学报》
1999年第4期309-311,共3页
Journal of Shenyang Institute of Chemical Technolgy
关键词
催化反应
光度法
锰
动力学
catalytic reaction
\ spectrophotometry
\ manganese(Ⅱ)