摘要
目的建立测定奥美拉唑的流动注射化学发光新方法。方法当将奥美拉唑注入到高锰酸钾与鲁米诺反应的合并流中时,可检测到强的化学发光信号,结合流动注射技术对实验条件进行优化。结果在优化的实验条件下,即混合管长度:150 cm,反应介质的碱度:0.15 mol/L NaOH,鲁米诺的浓度:7.0×10^-5mol/L,高锰酸钾的浓度:2.0×10-5mol/L以及试剂流速:2.8 mL/min,奥美拉唑浓度在2.0×10^-8-1.0×10^-5g/mL范围内与相对化学发光强度具有线性关系;对浓度为1.0×10^-7g/mL和1.0×10^-6g/mL奥美拉唑溶液进行11次平行测定的相对标准偏差分别为1.0%和2.6%;该方法的检出限为3×10^-9g/mL。结论该方法简单、快速、灵敏,适用于药物制剂中奥美拉唑的含量测定。
Objective To develop a new flow-injection chemiluminescence(FI-CL) method for the determination of omeprazole.Methods Strong chemiluminescence(CL) signal was found generated when omeprazole was injected into the reaction mixture of KMnO4 and luminol.The experimental conditions that affected the CL reaction were optimized by using FI mode.Results Under the optimum experimental conditions(150cm of mixing tubing,0.15mol/L NaOH,7.0×10^-5mol/L luminol,2.0×10^-5mol/L KMnO4 and 2.8mL/min of flow rate),CL intensity was linearly related to the concentration within the range of 2.0×10^-8-1.0×10^-5g/mL.The detection limit was 3×10^-9g/mL omeprazole,and the relative standard deviations(n=11) were 1.0% and 2.6% for 1.0×10^-7g/mL and 1.0×10^-6g/mL omeprazole solutions,respectively.Conclusion The proposed method is simple,rapid,sensitive,and suitable for determining omeprazole content in pharmaceutical preparations.
出处
《西安交通大学学报(医学版)》
CAS
CSCD
北大核心
2010年第3期378-381,390,共5页
Journal of Xi’an Jiaotong University(Medical Sciences)
基金
西安交通大学校内基金资助项目[No.08140009]~~
关键词
奥美拉唑
化学发光
流动注射
药物
omeprazole
chemiluminescence
flow-injection
pharmaceutical