期刊
TALANTA
卷 111, 期 -, 页码 54-61出版社
ELSEVIER
DOI: 10.1016/j.talanta.2013.03.032
关键词
Capillary electrophoresis; Capacitively coupled contactless conductivity detector; Acid orange 7; Degradation product
资金
- National Natural Science Foundation of China [20877025, 20977117]
- National Natural Science Foundation of Guangdong Province [92510027501000005, S2011010001836]
- Fundamental Research Funds for the Central Universities [09lgpy20]
- Science and Technology Research Programs of Guangdong Province [2012j4300118]
- Foundation of Industry-Education-Academy Cooperation from Gongdong Province
- Education Department of Chinese government [2009A090100047, 2010B090486]
- Science and Technology Research Programs of Dongguan City [0711220600311]
- Project of Education Bureau of Guangdong Province [2010-275]
Capillary electrophoresis (CE) with capacitively coupled contactless conductivity detector ((CD)-D-4) was developed to separate azo-dyestuff acid orange 7 (AO7) and its six degradation products. The analyzed products were sulfamic acid, oxalic acid, benzenesulfonic acid, 4-hydroxybenzene sulfonic acid, phthalic acid, and 4-aminobenzene sulfonic acid. In developing the method, types and concentrations of running buffers, injecting voltage and time, and applied voltage were tested to obtain optimum conditions to analyze target compounds. The separation was successfully achieved within 10 min using a fused-silica capillary under the following conditions: 20 mmol L-1 acetate acid buffer, electrokinetic injection of -12 kV x 10 s, and applied voltage of -13 kV. The developed method was applied to analyze degradation products in situ during the reaction of AO7 with Fenton reagent (Fe-II+H2O2 at pH 4.0). (C) 2013 Elsevier B.V. All rights reserved.
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