交流示波极谱滴定锌的研究
Study on Oscillopolarographic Titration of Zinc with EDTMP
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摘要: 本文提出了在pH9的0.10mol/L NH_3·H_2O-0.23mol/L NH_4Cl缓冲溶液中,用EDTMP滴定Zn,以Zn在交流示波极谱dE/dt-E曲线上切口消失直接指示终点。所研究的方法已用于测定一些铅锌矿和锌铝合金中的Zn,结果满意。Zn量分析范围为0.900—12.00mg,方法回收率为98.65—101.3％。对于含Zn xx％的试样分析10次相对标准偏差为0.26—1.27％。Abstract: A simple method for oscillopolarographic titration of Zn with ethylenediaminetetramethylphosphonic acid (EDTMP) is described. In a buffer solution of pH 9(0.10mol/L NH3f3H2O-0.23mol/L NH4C1), sharp Zn incision is given on dE/dt-E curves and zinc (0.900
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