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A new, simple and accurate micellar electrokinetic chromatography (MEKC) method is established for quantification of hydrocortisone, polymyxin B and Zn-bacitracin in local pharmaceutical preparations. The separation was carried out at 25C and 25kV, using a 15mmolL1 phosphate15mmolL1 borate buffer (pH8.2), 60mmolL1 sodium dodecylsulfate (SDS), and 10% methanol-water (v/v) as background electrolyte...
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