建立了复方化学消毒剂中常用有效成分醋酸洗必泰和苯扎氯铵(C12-BAC、C14-BAC及C16-BAC)同时分离测定的毛细管电泳(CE)方法.以37 cm×50 μm未涂层熔融石英毛细管为分离柱,以150 mmol/L磷酸二氢钠-62.5mmol/L磷酸(pH 2.5)缓冲液(含体积分数为40%的乙腈)为分离缓冲溶液,50 mmol/L醋酸-乙腈(体积比为1∶1)为样品介质,检测波长为214 nm.方法的日内及日间精密度分别小于3.0%及3.7%.醋酸洗必泰、C12-BAC、C14-BAC及C16-BAC的检出限(信噪比为3)分别为0.3、0.5、0.5、0.5 mg/L,定量限(信噪比为10)分别为1.0、1.5、1 5和1.5 mg/L,在1.0~ 400、1.5~ 200、1.5 ~ 200和1.5 ~ 200 mg/L范围内,4种有效成分的校正峰面积与相应质量浓度均具有良好的线性关系,相关系数分别为0.999 5、0.999 8、0.999 7和0.999 8.加标回收率为93.83%~ 104.97%.将该法用于实际样品分析,并与液相色谱的分析结果进行比对,获得满意结果.
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