蒋顺进 郑雪媚 林凌
摘 要:目的:采用HPLC法测定硫酸黏菌素组分含量。方法:测定色谱条件为:色谱柱为C18,5μm,4.6mm× 250mm,流动相为:称取无水硫酸钠13.38g用纯化水稀释至2700mL,用稀磷酸调节pH至2.3~2.5,加水稀释至3000mL,再加乙腈846mL,摇匀,过滤,即得。检测波长为215nm。结论:硫酸黏菌素在0.2~0.6mg/mL范围内线性关系良好,多黏菌素E1:相关系数R=0.9995、多黏菌素E2:相关系数R=0.9998、多黏菌素E3:相关系数R=0.9999、多黏菌素EI-1:相关系数R=0.9992、多黏菌素EI-7MOA:相关系数R=0.9996;硫酸黏菌素的回收率为98.6%~101.6%;多黏菌素E1重复性RSD为0.2%、多黏菌素E2重复性RSD为0.2%、多黏菌素E3重复性RSD为0.8%、多黏菌素EI-1重复性RSD为0.6%、多黏菌素EI-7MOA重复性RSD为0.5%。结论:该方法线性范围宽、分析时间短、样品前处理简便、定量结果准确、重现性好,为其质量控制提供了依据。
关键词:硫酸黏菌素;HPLC;组分含量测定
中图分类号 R521 文献标识码 A 文章编号 1007-7731(2017)12-0024-03
Abstract:Objective:To determine the colistin sulfate content by using the HPLC method.Methods:Determination of chromatographic condition:chromatographic column for C18,5μm,4.6mm×250mm,mobile phase:to get anhydrous sodium sulfate 13.38g diluted with purified water to 2700mL,adjusted the pH to 2.3~2.5 with dilute phosphoric acid,diluted with water to 3000mL,and then add acetonitrile 846mL,shake,filtering,is obtained.The detection wavelength was 215nm. Conclusion:colistin sulfate in 0.2~0.6mg/mL is in good linear relationship,and polymyxin E1:correlation coefficient R = 0.9995,polymyxin E2,correlation coefficient R=0.9998,polymyxin E3,correlation coefficient R=0.9999,polymyxin EI-1:the coefficient of R=0.9992,polymyxin EI-7MOA:correlation coefficient R=0.9996;colistin sulfate recovery rate is 98.6%~101.6%;polymyxin E1 RSD of repeatability was 0.2%,polymyxin E2 RSD of repeatability was 0.2%,polymyxin E3 RSD of repeatability was 0.8%,polymyxin E I-1 RSD of repeatability was 0.6%,polymyxin EI-7MOA repetitive RSD 0.5%.conclusion:it provides a basis for its quality control as its wide linear range,short analysis time,sample pretreatment is simple,accurate and reproducible.
Key words:Colistin sulfate;HPLC;Content determination
硫酸黏菌素又名克利斯汀、多粘菌素E、抗敵素等,系由多黏杆菌培养液中获得的碱性锁环状多肽类抗生素,是多黏菌素E1和E2的混合物。该产品为白色粉末,具有易溶于水、耐热、消化道不易吸收、排泄迅速、毒性小、无毒副作用、不易产生耐药菌株等特性。其对革兰氏阴性菌有很强的抗菌作用,几乎对所有革兰氏阴性菌有效,对绿脓杆菌有显著作用。
在鸡、猪的集约化饲养中,由大肠杆菌或沙门氏杆菌引起的动物疾病是一种常见病,感染面广、危害大。为了减少致病菌抗性的产生,世界范围内对抗生素的使用均有严格规定,人畜共用同种抗生素的现象日趋减少,硫酸黏菌素作为专用的兽用抗生素,能有效地防止这些致病菌的生长并提高饲料的转化率,同时还具有高效、低毒,在动物体内残留少的特点,在发达国家已广泛使用,产品供不应求。……