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Capillary electrophoresis coupled with electrochemical detection (CE–EC) for determination of antioxidants, propyl gallate (PG) and tert-butylhydroquinone (TBHQ), in cosmetic samples was proposed in this work. A porous etched joint was used to isolate the electrochemical detection from the electrophoretic high voltage. Compared with the 25μm i.d. capillary without a decoupler in a CE–EC system, a...
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