摘要
在较大量硫脲存在下,没食子酸-过氧化氢-甲醛体系中化学发光的动力学性质发生了变化,出现多峰现象,藉此实现了Co(Ⅱ)和Mn(Ⅱ)的化学发光同时测定。该法灵敏度高,选择性好,Co(Ⅱ)的测定范围是3×10^(-5)～2 ppm,Mn(Ⅱ)是0.03～10 ppm。
The chemiluminescent oxidation of gallic acid and formaldehyde in the presence of thiourea by alkaline H2O2 is found to be applied to the simultaneous determination of cobalt and manganese ions. The proposed method is highly selective to those ions. Detection limits are found to be 1. 5× 10-5 ppm for CO( Ⅱ ) and 0. 02 ppm for Mn( Ⅱ ). Relative standard deviations are 1% for 1× 10-3 ppm Co( Ⅱ ) and 1. 8% for 0. 4 ppm Mn( Ⅱ ) respectively.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第11期1199-1202,共4页
Chemical Journal of Chinese Universities
关键词
钴
锰
GA-H2O2-H2CO
化学发光法
The system of gallic acid-hydrogenperoxide-formaldehyde, Chemiluminescence, Cobalt, Manganese, Simultaneous determination
