Simple and Rapid Spectrophotometric Determination of Titanium on Etched Aluminum Foils

Abstract

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 Al 3+ 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).

Hybrid ZnO/TiO2Loaded in Electrospun Polymeric Fibers as Photocatalyst

“…Calibration curves return linear dependence in the plot of absorbance peak versus relative concentration of material. Based on this linear relationship, the corresponding concentration can be calculated from direct measurement of absorbance at characteristic peak [37,38].…”

Degradation of Acid Red 1 Catalyzed by Peroxidase Activity of Iron Oxide Nanoparticles and Detected by SERS

“…The concentration of AR 1 was measured at 505.06 nm by UV-vis spectrophotometry, using an Ocean View UV-Vis spectrophotometer. Besides, the concentration of H 2 O 2 during the degradation process was quantified using titanium sulfate spectrophotometry [15]. The absorbance of this solution was measured at 400.13 nm.…”

Study of Complexation of Titanium(iv) With 4-(2',3',4'-Trihydroxyphenyl)-2-Nitro-1-Sulfoazobenzene in the Presence of Surfactants

“…Organic reagents containing donor oxygen, nitrogen, and sulfur atoms are widely used to determine titanium. It is known, that for the determination of titanium in natural and industrial objects, the spectrophotometric method is considered the simplest and most express method [1][2][3][4][5][6][7]. Pyrogallol red, phenylfluorone, its analogues and xanthene dyes, which form the most stable chelates with titanium, are often used among such reagents [1][2][3][4][5][6][7].…”

“…It is known, that for the determination of titanium in natural and industrial objects, the spectrophotometric method is considered the simplest and most express method [1][2][3][4][5][6][7]. Pyrogallol red, phenylfluorone, its analogues and xanthene dyes, which form the most stable chelates with titanium, are often used among such reagents [1][2][3][4][5][6][7]. Recently, azoderivatives of pyrogallol have also attracted some interest [8,9].…”