2 ?Experimental2 1 Experimental Methods for Preparing Anodized I

2.?Experimental2.1. Experimental Methods for Preparing Anodized Indium Tin Oxide MembraneAnodized indium tin oxide was fabricated from indium tin oxide/glass by anodic oxidation. First, the ITO/glass is cleaned to remove the oil and then dried in an oven. Then www.selleckchem.com/products/Belinostat.html the ITO/glass is patterned by lithography and etched as a multi-window; the window area is fixed Inhibitors,Modulators,Libraries at 2 �� 2 mm2. Finally, the patterned ITO is treated by anodic oxidation. An electrolyte consisting of tartaric acid, ethyl alcohol, and high-purity deionized water (DI water) in the ratio of 3.5 g: 250 mL: 50 mL is used in this study. The developed films have a fine surface, grow slowly, and are easily controlled [6].A fixed current density is adopted in anodic oxidation; the optimal current condition herein is 0.6 mA/cm2.

The resistance of indium tin oxide is maintained at 400 k�� to maximize the sensitivity of the sensor to the acid-base. The calculated resistance of anodic indium tin oxide is:RAITO=VEnd?VStartI(1)where RAITO is the resistance of anodic indium tin oxide, VEnd is the final voltage of the voltmeter, VStart is the initial voltage of the voltmeter, and I Inhibitors,Modulators,Libraries is the fixed current. The top view and cross-section of the 1 �� 4 multi-window anodized-ITO/ITO/glass are shown in Figure Inhibitors,Modulators,Libraries 1.Figure 1.Planar view and cross section of anodized-ITO pH electrode.Figure 2 shows the anodic oxidation system. The current mirror produced a constant current, and the optimal condition for indium tin oxide is 0.6 mA/cm2.Figure 2.An indium tin oxide anodic oxidation system. The current mirror produced a constant current, and the optimal current condition is 0.

6 mA/cm2. An electrolyte consisting of tartaric acid, ethyl alcohol, and DI water in the ratio of 3.5 g: 250 cc: 50 cc …2.2. MaterialsThe following components were used for the sodium membrane preparation: poly (vinyl chloride) carboxylated (PVC-COOH), and bis(2-ethylhexyl) sebacate (DOS) were purchased from Sigma; Inhibitors,Modulators,Libraries sodium ionophore VI (B12C4), sodium tetrakis(4-fluorophenyl)borate dihydrate (Na-TFBD) were purchased from Fluka; sodium chloride and tetrahydrofuran (THF) used as a solvent were purchased from J. T. Baker; standard solutions were prepared with deionized water and all the other reagents used in this study were all purchased AV-951 through Uni-onward Corp. in Taiwan. The buffer solution for the sodium standards was blended by EDTA 1.

0 mmol/L and Tris 20 mmol/L with 1 L of DI water. Then the solution was added to 116.88 g of sodium chloride. Finally, the solution was adjusted to pH 7.5 with 0.5 M HCl for the optimum measuring conditions.2.3. Preparation of Sodium Ion Selective ElectrodesPreparation of sodium selleck chemicals ion selective electrodes was such that 33 mg of the main PVC-COOH was dissolved in 0.375 mL of tetrahydrofuran and the solution plasticizer (DOS), ionophore (B12C4), and lipophilic salt (Na-TFBD) were added to it.

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