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Position: Home > Articles > Quantitative Determination of Lova statin Content in Monascus at Its Open Ring Form by RP-HPLC with Ultraviolet Detector FOOD SCIENCE 2003,24 (3) 108-112

RP-HPLC以开环形式测定红曲中总Lovastatin含量

作  者:
文镜;常平;刘迪;金宗濂
单  位:
北京联合大学应用文理学院保健食品功能检测中心
关键词:
红曲;开环洛伐他汀;高效液相色谱
摘  要:
建立用反相高效液相色谱(RP-HPLC)以开环形式测定红曲样品中总Lovatatin含量的方法。红曲样品用0.2mol/LNaOH溶解,50℃超声提取转化60min,使样品中的Lovastatin全部转化为开环形式,再用硅胶吸附层析,初步除去样品中的色素及部分杂质。经过前处理后的样品以磷酸缓冲液-乙腈系统(V/V)65∶35为流动相,在1ml/min流速下用反相高效液相色谱分离去除残余色素及其它杂质干扰,开环Lovastatin用紫外检测器在238nm波长下检测。本方法的最低检测限为0.2μg/ml,在0.2~6μg/ml范围内呈良好的线性关系,γ=0.9991。6次重复测定样品加标回收率为96%±3%,变异系数为3%。采用本实验方法测定5种红曲发酵样品中的总Lovastatin含量均取得满意结果。
译  名:
Quantitative Determination of Lova statin Content in Monascus at Its Open Ring Form by RP-HPLC with Ultraviolet Detector
作  者:
Wen Jing et al
关键词:
monascus;lovastatin of open circul ar form;high performance liquid chr omatography
摘  要:
Amethod of RP -HPLCquantitative determination of lovastatin in monascu s at its open ring formwas introduced.The sample of monascus was dissolved in 0.2mol /L NaOH.For extraction and transformation of lovastatin in to its open ring form,u ltrasonic treatment was used at 50℃f or 60min.Use silica adsorption chromatography for removing pigmen t and part of the impurities in the sam ple.After pretreatment the crude sample was purified by reverse phase-HPLC(phosphate buffer -acetonitril system V /V =65∶35as mo-tive phase,elute rate 1ml /min).The ultraviolet detector at 238nma ssayed the open ring formof lovastatin.By this method it revealed a good linear relationship within 0.2~6μg /ml andγ=0.9991.The lower limit of detection was 0.2μg /ml.The assay of 6repeated samples with standard showed the recovery as96%±3%.The variation coefficient was 3%.Fi ve lovastatin samples of Monascus fe rmentation products were determined by the above method and successful re sults were obtained.It revealed that this method was reliable for use.

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