Sensitive Determination of Bromate in Water Samples by Capillary Electrophoresis Coupled with Electromembrane Extraction

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• 作者：Xiaoli Zhang ; Lin Guo ; Dongxue Zhang ; Xinxin Ge ; Jiannong Ye…
• 关键词：Bromate ; Drinking water ; Electromembrane extraction ; Capillary zone electrophoresis ; Capacitively contactless conductivity detection
• 刊名：Food Analytical Methods
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：9
• 期：2
• 页码：393-400
• 全文大小：396 KB
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• 作者单位：Xiaoli Zhang (1)
  Lin Guo (1)
  Dongxue Zhang (1)
  Xinxin Ge (1)
  Jiannong Ye (1)
  Qingcui Chu (1)
  
  1. School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Food Science
  Chemistry
  Microbiology
  Analytical Chemistry
  
• 出版者：Springer New York
• ISSN：1936-976X

文摘

Electromembrane extraction (EME) as a novel sample preparation technique was firstly applied for the purification and enrichment of bromate (BrO₃ −) in drinking water prior to capillary zone electrophoresis with capacitively coupled contactless conductivity detection (CZE-C4D). BrO₃ −, as the primary disinfection by-product of ozonation, could be well separated with the major inorganic anions coexisting in water samples using a 300 mmol L−1 acetic acid solution as the running buffer. Under the optimum conditions, the calibration curve showed good linearity (r 2 = 0.996), and the limit of detection was down to 0.12 ng mL−1 with the enrichment factor at 267. The relative standard deviation (RSD) values for peak area and migration time at a spiked concentration of 10 ng mL−1 of bromate were below 8.8 and 2.5 %, respectively. This proposed EME-CZE-C4D method has been successfully applied to analyze bottled drinking water and tap water samples with recoveries in the range of 85~98 %, providing an alternative to the determination of bromate in drinking water.