Babaiah O, Kesava Rao C, Sreenivasulu Reddy T, Krishna Reddy V
Talanta. 1996 Apr;43(4):551-8. doi: 10.1016/0039-9140(95)01766-6.
A simple and sensitive spectrophotometric method is developed for the determination of titanium in aqueous medium. The metal ion forms a reddish brown coloured complex with 2,4-dihydroxybenzaldehyde isonicotinoyl hydrazone (2,4-DHBINH) in the pH range 1-7. The complex shows two absorption maxima, one at 430 nm and the other at 500 nm. The reagent shows appreciable absorbance of 430 nm and negligible absorbance at 500 nm at pH 1.5. Beer's law is obeyed in the range 0.09 to 2.15 mug ml(-1) of titanium(IV). The molar absorptivity and the Sandell's sensitivity of the method are 1.35 x 10(4) 1 mol(-1) cm(-1) and 0.0049 mug cm(-2), respectively. A method for the determination of titanium by first-order derivative spectrophotometry is also proposed. The methods have been employed successfully for the determination of titanium in several alloy and steel samples.
开发了一种简单灵敏的分光光度法用于测定水介质中的钛。该金属离子在pH值为1 - 7的范围内与2,4 - 二羟基苯甲醛异烟酰腙（2,4 - DHBINH）形成红棕色络合物。该络合物有两个吸收最大值，一个在430 nm处，另一个在500 nm处。在pH 1.5时，该试剂在430 nm处有明显吸光度，在500 nm处吸光度可忽略不计。在0.09至2.15 μg ml(-1)的钛（IV）范围内符合比尔定律。该方法的摩尔吸光系数和桑德尔灵敏度分别为1.35×10(4) 1 mol(-1) cm(-1)和0.0049 μg cm(-2)。还提出了一种用一阶导数分光光度法测定钛的方法。这些方法已成功用于测定几种合金和钢样品中的钛。
