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China Surfactant Detergent & Cosmetics ›› 2025, Vol. 55 ›› Issue (7): 937-942.doi: 10.3969/j.issn.2097-2806.2025.07.015

• Analytical methods and testing • Previous Articles     Next Articles

Simultaneous determination of 6 flavonoids in grapefruit extract toothpaste by high performance liquid chromatography

Xiaoting Jin*(),Jinsheng Li   

  1. Lvliang Vocational and Technical College, Xiaoyi, Shanxi 032300, China
  • Received:2024-08-28 Revised:2025-06-19 Online:2025-07-22 Published:2025-07-23
  • Contact: *E-mail: jxt202402@126.com

Abstract:

In this study, a high performance liquid chromatography (HPLC) method was established to simultaneously detect six major flavonoids (naringin, hesperidin, neohesperidin, naringenin, eriocitrin, and tangeretin) in grapefruit extract toothpaste. The mobile phase was methanol and 0.1% formic acid aqueous solution, and the toothpaste extraction solvent was 80% methanol. The results of the methodological investigation show that the precision RSD ranges from 0.93% to 1.42%, the stability RSD ranges from 0.94% to 1.42%, and the repeatability RSD ranges from 1.14% to 1.44%, and all RSDs are less than 2.0%. The six flavonoids show a good linear relationship in the mass concentration range of 1-100 μg/mL, with a correlation coefficient of 0.999 4-0.999 8. The average recovery rate of the six flavonoids ranges from 95.20% to 104.57%, and the RSD ranges from 0.51% to 2.06%. The detection method in this study can accurately detect the content of the six flavonoids in grapefruit extract toothpaste, which has a reference value for the quality control of grapefruit extract toothpaste.

Key words: HPLC, toothpaste, grapefruit extract, flavonoids, simultaneous detection, quality control

CLC Number: 

  • TQ658