Journal of Guangxi Normal University(Natural Science Edition) ›› 2015, Vol. 33 ›› Issue (3): 111-116.doi: 10.16088/j.issn.1001-6600.2015.03.017

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Resonance Rayleigh Scattering Determination of Trace Bromate in Drinking Water Using Polyvinyl Alcohol-Boric Acid-iodine System

LI Chong-ning1,2,3, TANG Xue-ping1,2,3, DENG Wen-jing1,2,3, WEN Gui-qing1,2,3, LIU Qing-ye1,2,3, LIANG Ai-hui1,2,3, JIANG Zhi-liang1,2,3   

  1. 1.Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education,Guangxi Normal University, Guilin Guangxi 541004, China;
    2. Guangxi Key Laboratory of Environmental Pollution ControlTheory and Technology, Guangxi Normal University, Guilin Guangxi 541004, China;
    3. College of Environment andResources, Guangxi Normal University, Guilin Guangxi 541004, China
  • Received:2015-04-29 Online:2015-05-10 Published:2018-09-20

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Abstract: In hydrochloric acid medium containing boric acid, Mo(VI) catalyzed bromate oxidation of iodine ion to form iodine, and then it reacted with polyvinyl alcohol to form blue green complex. It exhibited a maximum absorption peak at 670 nm, and a maximum resonance scattering peak at 369nm. In the selected conditions, there was a good linear relationship between the absorbance and resonance Rayleigh scattering intensity and the concentration of a certain range of bromate. Therefore, two new methods of determination of bromate were put forward in drinking water with spectrophotometry and resonance Rayleigh scattering. By using the spectrophotometric method, the regression equation was ΔA= 0.086ρBrO-3-0.013, the linear range was from 1 to 30 μg/L, with a detection limit of 0.5 μg/L. By using the resonance Rayleigh scattering method, the regression equation was ΔI=406.44ρBrO-3+36.36, the linear range was from 0.1 to 2 μg/L, with a detection limit of 0.05 μg/L. Bromate in drinking water was determined by using resonance Rayleigh scattering method with satisfactory results.

Key words: bromate, catalysis, polyvinyl alcohol, resonance Rayleigh scattering

CLC Number: 

  • O657.3
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