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摘 要:目的:建立同时测定复方氟康唑霜中氟康唑、甲硝唑、氯霉素3组分含量的简便方法。方法:反相高效液相色谱法,采用外标法,Ultrasphere-ODS柱,流动相为甲醇-水(50∶50),检测波长261
nm。结果:线性范围分别是:氟康唑 40.1~200.6
μg.mL-1,r=0.999 4;甲硝唑 20.0~100.0 μg.mL-1,r=0.999 8;氯霉素 39.9~199.6
μg.mL-1,r=0.999 8。平均回收率:氟康唑98.31%;甲硝唑100.4%,氯霉素98.17%。结论:本法分离度好,快速,简便。适用于该制剂中3种成分的同时测定。 Determination of Fluconazole,
Metronidazole, Chloramphenicol Xia Xiaoping Abstract:Objective:To establish a method for determination
of the three constituents in compound Fluconazole cream: Fluconazole,
Metronidazole, Chloramphenicol.Method:RP-HPLC was
applied to quantitative analysis. Ultrasphere-ODS column was used.
The mobile phase was composed of methanol-water(50∶50).
The UV detection wave length was 261 nm. Results:The
linear response range from 40.1~200.6μg.mL-1
of Fluconazole(r=0.999 4).20.0~100.0μg.mL-1
of Metronidazole(r=0.999 8).39.9~199.6μg.mL-1
of Chloramphenicol(r=0.999 8). The mean recoveries of Fluconazole,
Metronidazole, Chloramphenicol were 98.31%, 100.4%, 98.17%. Conclusion:The
method is simple, sensitive and suitable for the determination of
the three constituents in compound cream. 复方氟康唑霜由氟康唑、甲硝唑、氯霉素、乳膏基质等组成,为医院新制剂。对念珠菌性、细菌性混合阴道感染有较好疗效[1]。关于氟康唑、甲硝唑等单方的含量测定,已有文献报道[2,3]。本实验采用反相高效液相色谱法,同时测定此复方制剂中氟康唑、甲硝唑、氯霉素的含量,方法准确、简便,为制剂质量的控制,提供了科学依据。 1 仪器与试药 338型高效液相色谱仪(美国Beckman),125双泵,166紫外检测器,406控制器。 2 实验方法与结果 2.1 色谱条件 色谱柱:Ultrasphere-ODS柱(4.6
mm×25 cm,5 μm);流动相为甲醇-水(50∶50);流速0.8 mL.min-1;柱温为室温;检测波长261
nm;检测灵敏度0.05 AUFS;进样量20 μL。 图1 对照品(A)及样品(B)色谱图 表1 系统适用性实验结果 |
名称 | 保留时间/min | 理论塔板数 | 分离度 |
甲硝唑 | 4.38 | 2657 |
|
氟康唑 | 6.08 | 2275 | 6.80 |
氯霉素 | 7.80 | 2751 | 4.59 |
表2 3种成分的线性关系 |
成分 | 线性方程 | r | 线性范围/μg.mL-1 |
甲硝唑 | C=3.4097A-1.1795 | 0.9998 | 20.0~100.0 |
氟康唑 | C=29.9244A+2.6866 | 0.9994 | 40.1~200.6 |
氯霉素 | C=2.6554A-0.9087 | 0.9998 | 39.9~199.6 |
表3 日内及日间精密度(%) |
成分 | 日内RSD(n=6) | 日间RSD(n=3) |
甲硝唑 | 0.34 | 1.23 |
氟康唑 | 1.02 | 1.66 |
氯霉素 | 1.06 | 2.00 |
表4 样品含量测定结果(百分标示量,n=3) |
样品 | 甲硝唑 | 氟康唑 | 氯霉素 |
1 | 97.3 | 102.4 | 99.4 |
2 | 103.1 | 98.1 | 98.0 |
3 | 98.4 | 96.3 | 98.7 |