STUDIES ON THE ELECTROANALYTICAL CHEMISTRY OF RARE EARTH ELEMENTS——POLAROGRAPHIC CATALYTIC WAVE OF E

• 作 者: 高小霞 张曼平
• 机 构: Department of Chemistry, Peking Universityrrrrrrrrn,Department of Chemistry, Peking Univers
• 出 处: Science in China,Ser.B
• 发表日期: 1982年07期
• 关键词: WAVE posed derivative utilized latter sweep moves ingle heated luminescent

A sensitive catalytic wave of Eu~(3+)-XO in derivative single-sweep polarography is pro-posed. The detective limit is 5×10~(-8)M Eu, and the linear range is 1×10~(-7)M-1×10~(-5)M. The mechanism of this catalytic wave has been studied by several experimental methods.It is proved that the catalytic wave behaves as an adsorptive-complex wave as well as an ECcatalytic wave in which free radical formed by the reduction of XO acts as an oxidizingagent. For this reason, Eu~(+3)-XO is the most sensitive catalytic wave among the rareearths.

A sensitive catalytic wave of Eu ~ (3 +) - XO in derivative single-sweep polarography is pro-posed. The detective limit is 5 × 10 ~ (-8) M Eu and the linear range is 1 × 10 ~ 7) M-1 × 10 ~ (-5) M. The mechanism of this catalytic wave has been studied by several experimental methods. It is proved that the catalytic wave behaves as an adsorptive-complex wave as well as an ECcatalytic wave in which For this reason, Eu ~ (+3) -XO is the most sensitive catalytic wave among the rareearths.