【摘要】 本文提出了用阳极溶出催化伏安法测定微量钯的方法,找到了灵敏度较高的富集底液和催化体系,钯在3×10¹⁰—1×10^-7M浓度范围内呈线性关系,最低检出浓度为1.2×10^-10M。更多还原

【Abstract】 A new method for determination of trace palladium by anodic stripping-catalytic voltammetry has been established. The Pd( Ⅱ ) was deposited with Hg (Ⅱ) on aglassy carbon electrode in NaCl-HCl-HgCl2 base-solution at -0.80V for several minutes. After the depositing, the glassy-carbon electrode was removed itno another cell containing a catalytic system, HClO4-HCl-SnCl2. A strippihg-catalytic peak of Pd at 0.40V(vs. Ag/AgCl) appeared when the potential was scanned forward positive. The height of the peak was linearly increased with the concentration of Pd( Ⅱ ) over the range of 3 × 10-10- 1×10-7M. The detection limit was 1.2× 10-10M. The relative standard derivations were less than ± 7.5%.更多还原