摘要
在乙二胺-氯化钾底液中,Mn(Ⅱ)催化空气中的氧氧化核固红,其氧化产物在E_p=-0.53V处有一还原波。在适宜条件下,其峰高与锰浓度在2.0×10^(-8)～1.0×10^(-5)mol/L范围内有线性关系。测定了水样中的锰并探讨了反应机理。
In a buffer solution of 0.15mol/L ethyldiamine-KCl at pH 11.4, Mn(en)_3^(2+) is the catalyst of the oxidation of nuclear fast red to the oxidized product by oxygen in the air. A reduced wave of the oxidized product has been obtained by single-sweep polarography. The peak height is directly proportional to CM_n in the range of 2.0×10^(-8)～1.0×10^(-5) mol/L, The proposed method has been applied to the determination of trace manganese in water sample. The mechanism of the catalytic reaction has been discussed.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1991年第6期707-710,共4页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金
关键词
锰
核固红
测定
极谱法
Single-sweep polarography, Manganese, Nuclear fast red
