From May 19 to 31, the State Food and Drug Administration issued a series of articles on its official website, asking all localities to strengthen the rectification of Ginkgo biloba drugs. According to the same kind of events, there have been several papers issued in succession, which is rare in the recent supervision work of the State Food and drug administration, which shows the importance of the State Administration of food and drug.
Testing products：
Serial number | Test items | test method | Limit |
1 | Identification experiment | Thin layer chromatography | - |
2 | water content | Drying method (method h, appendix IX, Part 1 of Pharmacopoeia) | ≤5.0% |
3 | Burning residue | Test method for residue on ignition (Appendix IX J, Part 1 of Pharmacopoeia) | ≤0.8% |
4 | heavy metal | Heavy metal detection method (Appendix IX e, Part 1 of Pharmacopoeia) | ≤20mg/kg（20 parts per million） |
5 | ginkgolic acid | High performance liquid chromatography (Appendix IX D, Part 1 of Pharmacopoeia) | ≤10mg/kg（10 parts per million） |
6 | Total flavonol glycosides | High performance liquid chromatography (Appendix IX D, Part 1 of Pharmacopoeia) | ≥24%（Based on dry products） |
7 | Terpenoids (based on the total amount of ginkgo lactone, ginkgolide A, Ginkgolide B and ginkgolide C) | High performance liquid chromatography (Appendix IX D, Part 1 of Pharmacopoeia) | ≥6.0%（Based on dry products） |
