微分脉冲极谱法测则定电解液(MnSO_4—H_2SO_4)中微量Ni(Ⅱ)

Determination of Trace Nickel in Electrolyte (MnSO_4—H_2SO_4) Using Differential Pulse Polarography

本文研究了用微分脉冲极谱法(D.P.P.)测定用Ti—Ni阳极电解而得的电解液(MnSO_4—H_2SO_4)中微量Ni(Ⅱ)的各项实验条件。提出在该测液中加入适量NH_4OH—NH_4Cl作为底液,在此底液中,所测得的Ni(Ⅱ)的微分脉冲极谱图,峰形良好,便于测量,其峰电位E_p=-0.95v(v.s.Ag—AgCl电极),可用标准加入法测定,方法简便、快速,并测定了Ti—Ni不溶性阳极的消耗速度。

Experiment conditions for determination of trace nickel in MnSO_4—H_2SO_4 electrolyte which is electrolysised by Ti—Ni anode using differential pulse polarography (D. P. P. ) had been studied. NH_4OH—NH_2Cl was used as supporting electrolyte. It was found that the peak potential of polarographic wave was -0.95v(vs Ag Agcl electrode) Concentration could be evaluated by standard addition. This method was simple and fast. Provide fundamentiat data for Calculating Ti—Ni anode consumable speed, Consumable speed of Ti—Ni anode is 2.5% y^(-1).