铋(Ⅲ)、铅(Ⅱ)和钒(Ⅴ)极谱吸附波的研究

Study on adsorptive polarographic waves of Bi(Ⅲ) ,Pb(Ⅱ) and V(Ⅴ)

研究了铜铁试剂(CUP)-六次甲基四胺-HAc体系中,Bi(Ⅲ)、Pb(Ⅱ)和V(Ⅴ)的极谱波性质,建立了同时测定水中Bi(Ⅲ)、Pb(Ⅱ)和V(Ⅴ)的新方法.上述金属离子分别在-0.34 V、-0.58 V和-0.77 V产生灵敏的极谱波.铋、铅和钒的浓度在1.0×10-6～3.0×10-8,3.0×10-6～1.0×10-7和5.O×10-7～1.0×10-8 mol/L范围,分别与相应峰高呈线性关系,检出限分别为1.0×10-8、9.5×10-8、9.0×10-9 mol/L.该方法用于模拟试样中这些痕量元素的测定.

This paper studied the adsorptive polarographic ＇behavers of Bi（ Ⅲ ）, Pb（ Ⅱ ） and V（ Ⅴ ） in presence of cupferrate-Hexamethylene telraming-HAc and developed a new method for the determination of Bi（ Ⅲ ）, Pb（ Ⅱ ） and V（ Ⅴ ） in water. This system showed sensitive polarographic waves of these metal ion at -0.34 V, -0.58 V and -0.77 V, respectively. The peak current was proportional to the ionic concentration of bismuth, lead and vanadium in the range of 1.0 ×10^-6 - 3.0 ×10^-8 , 3.0 ×10^-6 - 1.0 ×10^-7 and 5.0 ×10^-7 1.0 ×10^-8 mol/L, with the detection limits of 1.1 ×10^-8, 9.5 ×10^-8 and 9.0 ×10^-9 mol/L, respectively. The method could be used for the determination of these trace elements in water samples with satisfaitory results.