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A sensitive method of online preconcentration followed by capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C 4 D) is evaluated as a novel approach for the determination of benzoic acid and sorbic acid in soy sauce. The online preconcentration technique, namely field-enhanced sample injection, coupled with CE-C 4 D were successfully developed...
This research took granular activated carbon and resin as adsorbent separately, adopting pressure swing adsorption to purify gas containing low concentration toluene. Results from this trial show: NDA-150 resin has the optimum effect of adsorption for air containing toluene. The optimum adsorption rates of resin and activated carbon are 92.3% and 83.5% separately, and the optimum adsorption flux of...
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