微分脉冲极谱法测定EMD中微量铁

Differential Pulse Polarography Determination of Trace Iron in Manganese Dioxide

本文研究了用微分脉冲极谱法测定电解MnO_2(EMD)中微量铁的各项实验条件,选用柠檬酸三钠(Na_3C_6H_5O_7·2H_2O)作为支持电解质.在此底液中,所得Fe^(+2)的微分脉冲极谱图,峰形良好,便于测量,其峰电位E_p为—0.50V(相对Ag—AgCl电极,实验值),可用标准加入法测量.方法可靠,简便快速。

Experimental condition for the determination of trace iron in EMD by differential pulse polarography were studied, trisodium—Citric acid was used as supperting electrolytic it was found that the peak potential of polarographic wave was—0.50v(vs. Ag—Agcl electrode). The conditions could be evaluated by standard additions. This method was simple and quick.