Experimental Study of Closed System in the Chlorine Dioxide-Iodide-Sulfuric Acid Reaction by UV-Vis Spectrophotometric Method
The mole ratio r(r=[I−]0/[ClO2]0) has great influence on ClO2-I−-H2SO4 closed reaction system. By changing the initiate concentration of potassium iodide, the curve of absorbance along with the reaction time was obtained at 350 nm and 297 nm for triiodide ion, and 460 nm for iodine. The changing poi...
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Wiley
2011-01-01
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| Series: | International Journal of Analytical Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2011/130102 |
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| author | Na Li Laishun Shi Xiaomei Wang Fang Guo Chunying Yan |
| author_facet | Na Li Laishun Shi Xiaomei Wang Fang Guo Chunying Yan |
| author_sort | Na Li |
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| description | The mole ratio r(r=[I−]0/[ClO2]0) has great influence on ClO2-I−-H2SO4 closed reaction system. By changing the initiate concentration of potassium iodide, the curve of absorbance along with the reaction time was obtained at 350 nm and 297 nm for triiodide ion, and 460 nm for iodine. The changing point of the absorbance curve's shape locates at r=6.00. For the reaction of ClO2-I− in the absence of H2SO4, the curve of absorbance along with the reaction time can be obtained at 350 nm for triiodide ion, 460 nm for iodine. The mole ratio r is equal to 1.00 is the changing point of the curve's shape no matter at which wavelength to determine the reaction. For the reaction of ClO2-I−-H+ in different pH buffer solution, the curve of absorbance along with the reaction time was recorded at 460 nm for iodine. When r is greater than 1.00, the transition point of the curve's shape locates at pH 2.0, which is also the point of producing chlorite or chloride for chlorine dioxide at different pH. When r is less than 1.00, the transition point locates at pH 7.0. |
| format | Article |
| id | doaj-art-1c9e0cbdc2f747aba733245233a8fb45 |
| institution | Kabale University |
| issn | 1687-8760 1687-8779 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
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| series | International Journal of Analytical Chemistry |
| spelling | doaj-art-1c9e0cbdc2f747aba733245233a8fb452025-02-03T06:05:55ZengWileyInternational Journal of Analytical Chemistry1687-87601687-87792011-01-01201110.1155/2011/130102130102Experimental Study of Closed System in the Chlorine Dioxide-Iodide-Sulfuric Acid Reaction by UV-Vis Spectrophotometric MethodNa Li0Laishun Shi1Xiaomei Wang2Fang Guo3Chunying Yan4School of Chemistry and Chemical Engineering, South Campus, Shandong University, Jinan 250061, ChinaSchool of Chemistry and Chemical Engineering, South Campus, Shandong University, Jinan 250061, ChinaSchool of Chemistry and Chemical Engineering, South Campus, Shandong University, Jinan 250061, ChinaSchool of Chemistry and Chemical Engineering, South Campus, Shandong University, Jinan 250061, ChinaSchool of Chemistry and Chemical Engineering, South Campus, Shandong University, Jinan 250061, ChinaThe mole ratio r(r=[I−]0/[ClO2]0) has great influence on ClO2-I−-H2SO4 closed reaction system. By changing the initiate concentration of potassium iodide, the curve of absorbance along with the reaction time was obtained at 350 nm and 297 nm for triiodide ion, and 460 nm for iodine. The changing point of the absorbance curve's shape locates at r=6.00. For the reaction of ClO2-I− in the absence of H2SO4, the curve of absorbance along with the reaction time can be obtained at 350 nm for triiodide ion, 460 nm for iodine. The mole ratio r is equal to 1.00 is the changing point of the curve's shape no matter at which wavelength to determine the reaction. For the reaction of ClO2-I−-H+ in different pH buffer solution, the curve of absorbance along with the reaction time was recorded at 460 nm for iodine. When r is greater than 1.00, the transition point of the curve's shape locates at pH 2.0, which is also the point of producing chlorite or chloride for chlorine dioxide at different pH. When r is less than 1.00, the transition point locates at pH 7.0.http://dx.doi.org/10.1155/2011/130102 |
| spellingShingle | Na Li Laishun Shi Xiaomei Wang Fang Guo Chunying Yan Experimental Study of Closed System in the Chlorine Dioxide-Iodide-Sulfuric Acid Reaction by UV-Vis Spectrophotometric Method International Journal of Analytical Chemistry |
| title | Experimental Study of Closed System in the Chlorine Dioxide-Iodide-Sulfuric Acid Reaction by UV-Vis Spectrophotometric Method |
| title_full | Experimental Study of Closed System in the Chlorine Dioxide-Iodide-Sulfuric Acid Reaction by UV-Vis Spectrophotometric Method |
| title_fullStr | Experimental Study of Closed System in the Chlorine Dioxide-Iodide-Sulfuric Acid Reaction by UV-Vis Spectrophotometric Method |
| title_full_unstemmed | Experimental Study of Closed System in the Chlorine Dioxide-Iodide-Sulfuric Acid Reaction by UV-Vis Spectrophotometric Method |
| title_short | Experimental Study of Closed System in the Chlorine Dioxide-Iodide-Sulfuric Acid Reaction by UV-Vis Spectrophotometric Method |
| title_sort | experimental study of closed system in the chlorine dioxide iodide sulfuric acid reaction by uv vis spectrophotometric method |
| url | http://dx.doi.org/10.1155/2011/130102 |
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