[摘要]目的 建立中藥鉤藤中鉤藤堿和異鉤藤堿含量的高效液相色譜檢測方法,為中藥鉤藤中有效成分的含量測定提供科學的參考。 方法 高效液相色譜條件為:色譜柱 Phenomenex C18 (250 nm×4.0 nm, 5μm),流動相:甲醇-水(55∶45),紫外檢測波長:254 nm,流速:1.0 mL/min,柱溫:28℃, 進樣量:20μL。 結果 以峰面積為縱坐標濃度為橫坐標,計算得到鉤藤堿和異鉤藤堿回歸方程分別為Y=0.999 E + 6x-21 133,R2=0.9998和Y=1.008 E+ 6x-13 556,R2=0.9999。結果顯示鉤藤堿和異鉤藤堿分別在0.244~1.534 μg和0.226~1.288 μg濃度范圍內其濃度與峰面積具有良好的線性關系。另外本法在精密度、穩定性、重復性上均取得了較好結果。 結論 高效液相色譜法測定鉤藤中藤堿和異鉤藤堿含量,具有快速、簡便、重復性好的特點,值得在中藥含量測定上大力推廣應用。
[關鍵詞] 鉤藤;鉤藤堿;異鉤藤堿;含量檢測;高效液相色譜法
[中圖分類號] R284.1 [文獻標識碼] B [文章編號] 2095-0616(2013)13-97-02
Study of the content determination of rhynchophylline and isorhynchophylline in Uncaria rhynchophylla by HPLC
ZHAO Xiaoli MA Yan
Henan Province Zhumadian Institute for Food and Drug Control,Zhumadian 463000,China
[Abstract] Objective Establish the HPLC method to determine the contents of rhynchophylline and isorhynchophylline in Uncaria rhynchophylla and provide scientific guidance for determining the contents of active ingredient in Uncaria rhynchophylla. Methods Contents of rhynchophylline and isorhynchophylline was measured by HPLC. Column of Diamonsi (250 nm×4.0 nm,5μm),solvent system:Methanol︰H2O(55︰45),UV wave:254 nm,Flow rate:1.0 mL/min,column temperature:28℃,Injection volume:20μL. Results We established the regression equation of rhynchophylline and isorhynchophylline Y=0.999 E+6x-21133,R2=0.9998 and Y=1.008 E+ 6x-13556,R2=0.9999,by making peak area as the ordinate and concentration as abscissa. Moreover this method got good results in precision,stability and repeatability. Conclusion The method that determining the contents of rhynchophylline and isorhynchophylline in Uncaria rhynchophylla by HPLC has the advantage on quick,simple,reproducible,and has a huge value in determining the contents of Chinese traditional Medicine.
[Key words] Uncaria rhynchophylla;Rhynchophylline;Isorhynchophylline;Content determine;HPLC
鉤藤(Uncaria rhynchophylla)是一種具有降血壓、鎮靜、抗驚厥作用的傳統中藥[1]。它屬于茜草科,主要可分為大葉鉤藤、毛鉤藤、無柄果鉤藤三大類[2]。隨著現代分離鑒定技術的進步,目前人們已從鉤藤中分離鑒定得到30多種化合物,其中生物堿為其主要的活性成分[3]。傳統的測定鉤藤中生物堿含量的方法為薄層色譜法,但是隨著現代分析技術的進步,高效液相色譜技術已成為中藥中有效成分檢測的最精確、有效的手段[4]。本研究利用高效液相色譜技術確定了鉤藤堿和異鉤藤堿在中藥鉤藤中含量的測定方法,此方法具有準確度高、重復性好、快速、簡便的優點,便于在鑒定工作中推廣應用,現將測定方法報道如下?!?br>