本文研究了在CTMAB存在下、于pH1.5～2.8的盐酸—NaAc缓冲介质中,钛与铬天青B可形成水溶性配合物,在565nm处有最大吸收。络合物的组成比为Ti:CAB=1:2,0～7μg/25ml符合比尔定律,摩尔吸光系数等于8.13×10~4,应用于钢中微量Ti的测定得到良好效果。 一、试剂与仪器 铬天青B(CAB):0.1％水溶液(天津化学试剂一厂产品); CTMAB:0.5％水溶液; In the presence of CTMAB, titanium and chrome azure B can form water-soluble complexes in hydrochloric acid-NaCl-HCl buffer solution at pH 1.5-2.8, with maximum absorption at 565 nm. The composition ratio of the complex is Ti: CAB = 1: 2, and the molar absorptivity is equal to 8.13 × 10 ~ 4, which is in good agreement with Beer’s law. First, the reagents and equipment Chromium Azure B (CAB): 0.1% aqueous solution (Tianjin Chemical Reagent Factory products); CTMAB: 0.5% aqueous solution;