A micellar capillary electrophoresis(MCE) method based on on-line sweeping technique was(developed) for a determination of trace quinolones,ciprofloxacin ofloxacin and enrofloxacin in pork tissue.The pork tissue s...A micellar capillary electrophoresis(MCE) method based on on-line sweeping technique was(developed) for a determination of trace quinolones,ciprofloxacin ofloxacin and enrofloxacin in pork tissue.The pork tissue samples were deproteinized with trichloroacetic acid and in the running buffer of 20 mmol/L(Na2B4O7)+80 mmol/L sodium dodecyl sulfate(SDS),pH=9.6,the ciprofloxacin,ofloxacin and enrofloxacin in the sample were successfully separated and detected within 200 s,in a non-coating fused-silica capillary column(48.5 cm×75 μm i.d.,effective length 40 cm) at separation voltage of 18 kV,and the injection pressure of 15×102 Pa,with UV detection at 278 nm.The detection limits of ciprofloxacin,ofloxacin and enrofloxacin were 0.007,0.016 and 0.020 mg/L,and RSD were 2.0%,2.4% and 2.6%,respectively.This method allows of up to 600-fold accumulation concentration of ciprofloxacin and can be used to separate and detect the residuals of trace medicines in animal food.展开更多
文摘A micellar capillary electrophoresis(MCE) method based on on-line sweeping technique was(developed) for a determination of trace quinolones,ciprofloxacin ofloxacin and enrofloxacin in pork tissue.The pork tissue samples were deproteinized with trichloroacetic acid and in the running buffer of 20 mmol/L(Na2B4O7)+80 mmol/L sodium dodecyl sulfate(SDS),pH=9.6,the ciprofloxacin,ofloxacin and enrofloxacin in the sample were successfully separated and detected within 200 s,in a non-coating fused-silica capillary column(48.5 cm×75 μm i.d.,effective length 40 cm) at separation voltage of 18 kV,and the injection pressure of 15×102 Pa,with UV detection at 278 nm.The detection limits of ciprofloxacin,ofloxacin and enrofloxacin were 0.007,0.016 and 0.020 mg/L,and RSD were 2.0%,2.4% and 2.6%,respectively.This method allows of up to 600-fold accumulation concentration of ciprofloxacin and can be used to separate and detect the residuals of trace medicines in animal food.