拟定了测定痕量钼的新催化光度法，方法基于盐酸联氨还原苯胺蓝钼（Ⅵ）的催化效应。研究了溶液ｐＨ值、试剂浓度和干扰离子对反应速率的影响，讨论了催化反应的机理。在不同温度条件下，测定钼的线性范围是０．１～１．５ｍｇ·Ｌ－１，检出限是１．２×１０－２ｍｇ·Ｌ－１相对标准偏差是２．４％，催化反应的表现活化能是４４．７ｋＪ·ｍｏｌ－１．方法用于测定豆样品中痕量钼。 A new catalytic spectrophotometric method for the determination of trace molybdenum was developed. The method was based on the catalytic effect of hydrazine dianhydride reduction of aniline blue molybdenum (Ⅵ). The effects of solution pH, reagent concentration and interfering ions on the reaction rate were investigated. The mechanism of the catalytic reaction was discussed. Under different temperature conditions, the linear range of molybdenum determination was 0.1-1.5 mg · L-1, the detection limit was 1.2 × 10-2 mg · L-1, and the relative standard deviation was 2.4%. The catalytic reaction The activation energy is 44.7kJ · mol-1. Method for determination of trace amounts of molybdenum in bean samples.