【摘要】 <正> 钼的催化极谱测定国内外已有不少报导,但在硝酸—硝酸钠底液中,8—羟基喹啉—钼配合物在悬汞电极上吸附催化还原,测定钢铁中微量钼还少见。本文研究了在0.7M NaNO₃—0.01M HNO₃—3×10^-4M8—羟基喹啉体系中（pH～1.9）,8—羟基喹啉—钼配合物的吸附催化波,其导数峰电位更多还原

【Abstract】 A method for the microdetermination of molybdenum in steel based on catalytic reduction of the 8-hydroxyquinoline - Mo(VI) complex is described. The 8-hydro-xyquinoline-Mo (VI) complex has a adsorptive catalytic wave at a potential of -0.48V(vs.SCE) in 0.7M NaNO3-0.01M HNO3(pH, 1.9). A linear calibraton is obtained for a concentration range from 6×10-8 -1×10-6M. Adsorptive preconc-entration for 90s results in a detection limit of 1x10~8M. Iron only interferes at concentration higher than 1×10-4 M in the sample. The interference of iron(III) is eliminated by addition of acetic acid.更多还原