在0.2—0.8/Ⅳ的盐酸介质中,钼(Ⅵ)与水杨基荧光酮以及溴化十六烷基三甲基铵,可以形成一红色三元络合物。络合物的最大吸收峰位于530纳米,表观摩尔吸光系数ε_(530)=1.40×10~5。钼的浓度为0—8微克/25毫升时,络合物溶液的吸光度遵守比尔定律。三元络合物的组成经测定Mo:SAF:CTMAB=1:2:2。常见金属离子中,除钛与钨(Ⅵ)以外,均不干扰钼的测定。利用本显色反应,曾对多种合金钢中的钼含量进行了测定,取得了较好的效果。 In 0.2-0.8 / Ⅳ hydrochloric acid medium, molybdenum (Ⅵ) and salicylfluorone and cetyltrimethylammonium bromide can form a red ternary complex. The maximum absorption peak of the complex was at 530 nm with an apparent molar absorptivity of ε 530 (530) = 1.40 × 10 -5. The absorbance of the complex solution obeys Beer’s law when the molybdenum concentration is 0-8 μg / 25 ml. The composition of the ternary complex was determined Mo: SAF: CTMAB = 1: 2: 2. Common metal ions, in addition to titanium and tungsten (Ⅵ) outside, do not interfere with the determination of molybdenum. The use of the color reaction, a variety of alloy steel in the molybdenum content was measured, and achieved good results.