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基于Ti(Ⅳ)能与曙红、溴离子形成可溶于乙醇的悬浮物,据此建立了悬浮物光度法测定痕量Ti(Ⅳ)的新方法。该悬浮物表观摩尔吸光系数ε530值为2.54×107L·mol-1·cm-1,线性范围为1～100ng/mL,检出限为8.2×10-9g/L。本法用于发样中Ti(Ⅳ)含量的测定,结果满意。
Based on Ti (Ⅳ) and eosin, bromine ions can form ethanol - soluble suspended solids, thus establishing a new method for the determination of trace Ti (Ⅳ) by spectrophotometry. The apparent molar absorptivity ε530 of the suspension was 2.54 × 107 L · mol-1 · cm-1, the linear range was 1 ~ 100 ng / mL and the detection limit was 8.2 × 10-9 g / L. This method is used to determine the content of Ti (Ⅳ), with satisfactory results.