Abstract: A method for identifying the adulteration of a pine bark extract or a peanut skin extract in a grape seed extract using HPLC fingerprint spectrums. The method includes 1) establishing HPLC fingerprint spectrums of the three extracts; 2) determining characteristic peaks of pine bark extract and peanut skin extract; 3) testing a grape seed extract sample using liquid chromatography detection to identify the adulteration of pine bark extract or peanut skin extract in the sample according to whether the chromatogram contains the characteristic peaks of pine bark extract and/or peanut skin extract, wherein the addition of more than 3% of adulterants can be accurately identified. The method has good stability and reproducibility, high efficiency, obvious identification characteristics, provides a theoretical basis for the identification of the plant sources of grape seed extracts, and is conducive to promoting the healthy development of the plant extract industry.

Abstract: Disclosed is a method for identifying grape seed extract authenticity using the HPLC fingerprint spectrum, and in particular, a method for identifying the adulteration of a pine bark extract or a peanut skin extract in a grape seed extract. The method comprises the following steps: 1) establishing the HPLC fingerprint spectrums of the grape seed extract, the pine bark extract and the peanut skin extract, respectively; 2) determining a characteristic peak of pine bark extract and a characteristic peak of peanut skin extract; 3) subjecting the grape seed extract sample to be tested to liquid chromatography detection, identifying the adulteration of the pine bark extract or the peanut skin extract in the sample to be tested according to whether the chromatogram contains the characteristic peaks of the pine bark extract and/or the peanut skin extract, wherein the addition of more than 3% of adulterants can be accurately identified.