Determining the Levels of Four Phenylethanoid Glycosides and Five Triterpene Acids in Liuwei Dihuang Capsule Using Solid Phase Extraction with HPLC-UV

<div>HPLC-UV chromatogram of (a) four phenylethanoid glycosides mixed standards, (b) LDC solution A, (c) herbal Radix Rehmanniae test solution, and (d) negative sample solution A with gradient program A (1) purpureaside C, (2) jionoside A1, (3) acteoside, and (4) isoacteoside.</div>

Journal of Analytical Methods in Chemistry

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Figure 2: Determining the Levels of Four Phenylethanoid Glycosides and Five Triterpene Acids in Liuwei Dihuang Capsule Using Solid Phase Extraction with HPLC-UV 

Figure 2 | Determining the Levels of Four Phenylethanoid Glycosides and Five Triterpene Acids in Liuwei Dihuang Capsule Using Solid Phase Extraction with HPLC-UV 