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

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Abstract

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.

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Acknowledgments

The authors gratefully acknowledge the funding from the Natural Science Foundation of China (No. 21205042), the Open Funds of the State Key Laboratory of Electroanalytical Chemistry (SKLEAC201508), and the Students Innovative Experimental Project of Shanghai Municipality (No. 201310269117).

Conflict of Interest

Xiaoli Zhang declares that she has no conflict of interest. Lin Guo declares that she has no conflict of interest. Dongxue Zhang declares that she has no conflict of interest. Xinxin Ge declares that she has no conflict of interest. Jiannong Ye declares that he has no conflict of interest. Qingcui Chu declares that she has no conflict of interest. This article does not contain any studies with human or animal subjects.

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Authors and Affiliations

  1. School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China

    Xiaoli Zhang, Lin Guo, Dongxue Zhang, Xinxin Ge, Jiannong Ye & Qingcui Chu

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  1. Xiaoli Zhang
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  2. Lin Guo
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  3. Dongxue Zhang
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  4. Xinxin Ge
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  6. Qingcui Chu
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Correspondence to Qingcui Chu.

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Zhang, X., Guo, L., Zhang, D. et al. Sensitive Determination of Bromate in Water Samples by Capillary Electrophoresis Coupled with Electromembrane Extraction. Food Anal. Methods 9, 393–400 (2016). https://doi.org/10.1007/s12161-015-0208-5

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  • DOI: https://doi.org/10.1007/s12161-015-0208-5

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