simultaneous determination of chlorine dioxide and hypochlorous acid in bleaching system
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ID: 178034
2011
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Abstract
This study has demonstrated a rapid spectroscopic method for the determination of chlorine dioxide and hypochlorous acid concentrations in the pulp bleaching processes. It was found that chlorine dioxide and hypochlorous acid have an isosbestic wavelength of 295 nm. The soluble lignin in such a system is the main interference, but can be corrected by determining the absorbances at 295 nm, 380 nm, and 480 nm. Thus, based on the spectroscopic measurements at 295 nm (the isosbestic point wavelength for chlorine dioxide and hypochlorous acid), 380 nm (absorbance wavelength of chlorine dioxide) and 480 nm (the acid soluble lignin absorbance wavelength), the chlorine dioxide and hypochlorous acid concentrations in the bleaching process can be quantified. However, hypochlorous acid was not detected in the real bleaching effluent for its low content. The present method is simple, rapid, accurate, and has the potential for on-line monitoring of the chlorine dioxide bleaching process.
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wang2011bioresourcessimultaneous
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| Authors | ;Qiang Wang;Kefu Chen;Jun Li Mail;Jun Xu;Shanshan Liu Mail |
| Journal | medical archives (sarajevo, bosnia and herzegovina) |
| Year | 2011 |
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