机构地区: 广东工业大学轻工化工学院化学工程系
出 处: 《岩矿测试》 1999年第2期157-159,共3页
摘 要: 在5.0×10-3mol/LH2SO4介质中,溴化十六烷基吡啶(CPB)和OP存在下,Ti(Ⅳ)与溴邻苯三酚红(BPR)形成红紫色络合物。该络合物的λmax=638nm,ε为5.81×104L·mol-1·cm-1,钛的质量浓度为0~0.32mg/L时符合比尔定律。拟定的方法用于硅酸盐岩石中微量钛的测定,结果与原结果相符,RSD(n=6)<1.50%。 In 5.010-3 mol/L H2SO4 medium and in the presence of cetylpyridine bromide and OP, titanium () reacts with bromopyrogallol red to form a purpureal complex. The complex exhibits maximum absorption at 638 nm with the apparent molar absorptivity of 5.81104 Lmol-1cm-1. Beers law is obeyed in the range of 00.32 mg/L for Ti. The proposed method has been applied to the spectrophotometric determination of trace titanium in silicate rocks. The results are in good agreement with recommended values with precision of <1.5% RSD (n=6).\=\=