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在4.0×10~(-6)M 3,5-Cl_2-DMPAP_(-2.0％)NH_2OH.CI-0.40M NH_3.H_2O底液中,用单扫描示波极谱仪可获得Co-3,5-CI_2-DMPAP配合物-灵敏的极谱波。该波的峰电位为-o.70V(S.C.E.),导数波高与钻浓度在0.80PPb-9.6PPb范围内呈线性关系,检测下限可达0.4PPb。该法应用于VB_(12)中痕量钻的测定,结果满意.
In a 4.0 × 10 -6 M 3,5-Cl 2 -DMPAP _ (- 2.0%) NH_2OH.Cl-0.40M NH_3.H_2O solution, single-sweep oscillopolarography was used to obtain Co-3,5 -CI_2-DMPAP complex-sensitive polarographic wave. The peak potential of this wave is -o.70V (S.C.E.). The derivative wave height has a linear relationship with the drill concentration in the range of 0.80PPb-9.6PPb, and the detection limit can reach 0.4PPb. The method was applied to the determination of trace diamonds in VB_ (12) with satisfactory results.