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首页> 外文期刊>American Journal of Analytical Chemistry >Simple and Rapid Spectrophotometric Determination of Titanium on Etched Aluminum Foils
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Simple and Rapid Spectrophotometric Determination of Titanium on Etched Aluminum Foils

机译：简单快速的分光光度法测定铝箔上的钛

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摘要

Introduction of titanium oxides with high permittivity on etched aluminum foils’ surface has been successfully utilized to increase specific capacitance of anode foils for aluminum electrolytic capacitors. In order to quantify the concentration of titanium (IV) on the etched aluminum foil precisely, a simple and rapid spectrophotometric procedure has been developed. After optimizing a series of variables including absorbance wavelength, concentration of nitric acid, concentration of hydrogen peroxide, nitration time and developing time, analytical precision and accuracy were tested by using standard working solution containing known amount of titanium (IV). The results showed that Lambert-Beer’s law was obeyed in the range of 0.01 to 3.00 mmol·L﹣1. The relative standard deviation (RSD) ranged from 0.67% to 1.09% (n = 6), and the recovery was between 99.17% - 100.03%. Investigation on effect of Al3+ ion indicated that there was no interference in the absorbance of titanium (IV) at 410 nm. The proposed procedure was applied to real samples for the determination of titanium (IV), and the results were in a good agreement with the values certified by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
机译：在已腐蚀的铝箔表面上引入高介电常数的氧化钛已被成功地用于增加铝电解电容器阳极箔的比电容。为了精确地定量蚀刻铝箔上钛（IV）的浓度，开发了一种简单而快速的分光光度法。在优化了一系列变量（包括吸收波长，硝酸浓度，过氧化氢浓度，硝化时间和显影时间）后，使用含有已知量钛（IV）的标准工作溶液测试了分析精度和准确性。结果表明，在0.01至3.00 mmol·L﹣1范围内遵循朗伯-比尔定律。相对标准偏差（RSD）在0.67％至1.09％之间（n = 6），回收率在99.17％至100.03％之间。对Al3 +离子的影响的研究表明，在410 nm处对钛（IV）的吸收没有干扰。拟议的程序用于实际样品中的钛（IV）的测定，结果与电感耦合等离子体原子发射光谱法（ICP-AES）认证的值非常吻合。

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