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Application of Nanometer-Size Titanium Dioxide in Extreme-Trace V(Ⅴ) Analysis

Application of Nanometer-Size Titanium Dioxide in Extreme-Trace V(Ⅴ) Analysis
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摘要 The adsorption properties of nanometer-size TiO2 for V(Ⅴ ) were studied. The adsorption rate could reach above 99~ when the pH values were at the range of 4 10. The adsorption balance time was 10 min , the saturation capacity of adsorption of nanometer-size TiO2 to V(Ⅴ) was 6.43 mg per gram. Using 2 mL 1.5 mol · L^-1 NaOH as elution, we found the elution rate could reach 95%. A novel method of extreme-trace V(Ⅴ ) preconeentration with nanometer-size titanium dioxide and determination by graphite furnace atomic absorption spectroscopy (GFAAS) was advanced. The detection limit(3σ)of the method was 0.61μg ·L^-1 , and the relative standard deviation was 8.1% (n=6) of 2.5μg ·L-^1 V(Ⅴ). Environmental samples experiments were also conducted to test the feasibility of the method, and it came out that the recovery rates were between 91.2% and 102.0%. The adsorption properties of nanometer-size TiO2 for V(Ⅴ ) were studied. The adsorption rate could reach above 99~ when the pH values were at the range of 4 10. The adsorption balance time was 10 min , the saturation capacity of adsorption of nanometer-size TiO2 to V(Ⅴ) was 6.43 mg per gram. Using 2 mL 1.5 mol · L^-1 NaOH as elution, we found the elution rate could reach 95%. A novel method of extreme-trace V(Ⅴ ) preconeentration with nanometer-size titanium dioxide and determination by graphite furnace atomic absorption spectroscopy (GFAAS) was advanced. The detection limit(3σ)of the method was 0.61μg ·L^-1 , and the relative standard deviation was 8.1% (n=6) of 2.5μg ·L-^1 V(Ⅴ). Environmental samples experiments were also conducted to test the feasibility of the method, and it came out that the recovery rates were between 91.2% and 102.0%.
出处 《Wuhan University Journal of Natural Sciences》 CAS 2006年第2期437-440,共4页 武汉大学学报(自然科学英文版)
基金 SupportedbytheNaturalScienceFoundationofHubeiProvince
关键词 nanometer-size TiO2 V(Ⅴ) graphite furnace atomic absorption spectroscopy GFAAS extreme-trace analysis nanometer-size TiO2 V(Ⅴ) graphite furnace atomic absorption spectroscopy ( GFAAS ) ; extreme-trace analysis
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