Unit conversion
0.8% = 8 mg/g = 8,000 mg/kg = 8,000 ppm by mass. The analyte stays the same.
GINKGO BILOBA · Lab parameter calculator
Laboratory parameter conversion calculator
Align the material, analytical target and reporting basis before comparing standards or purchasing value. Connect testing in China with batch estimates and sourcing.
Evidence reviewed
Functions and workflow
Turn assay reports into comparable sourcing data. Convert mass-fraction units, correct between as-received and dry basis, and calculate weighted estimates for batches of the same analyte.
Identify the report basis
Choose ginkgo leaf or extract and the same analytical target, such as flavonol glycosides or terpene lactones. Record method, lot, unit and basis.
Choose the calculation
Use conversion to compare reports; enter received mass, moisture and assay for each lot to combine batches. Changing units alone on the same basis needs no moisture correction.
Review and use the result
Check the result and reference edition, then download the batch record. You can choose to include actual calculation results in a testing or quotation inquiry.
Read the outputs through examples
Dry-basis correction
An as-received assay of 0.8% with 10% moisture becomes approximately 0.888889% dry basis; no constituent has been added.
Batch weighting
The example button uses 100 kg / 10% moisture / 1% dry-basis assay and 300 kg / 50% / 3%. Totals: 400 kg received, 240 kg dry matter and 5.4 kg constituent; weighted dry assay 2.25%, rather than the simple mean of 2%.
These are teaching assumptions, not supplier test results. Estimated constituent mass is the total derived from assay data; this tool does not calculate extraction yield or recoverable extract output.
Parameter conversion and comparison
1% = 10 mg/g = 10,000 mg/kg; 1 ppm by mass = 1 mg/kg. Unit conversion does not change the analyte or make total flavonoids, flavonol glycosides or different lactone groups interchangeable.
Only individual sourced numerical limits are compared mathematically. Full current pharmacopoeial compliance, authenticity, impurities and method applicability require evaluation against the original test report.
Leaf batch assay estimate
Enter received mass, moisture and a representative sample assay for the same constituent in every batch. The estimate weights dry matter, rather than averaging percentages across different batch sizes.
Your entries stay in this browser until you choose to transfer them to the inquiry form and make the final submission. Nothing is sent automatically or placed in the page URL.
The estimate depends on samples representing their batches. It is not a measurement or guarantee of the whole batch, nor recoverable extract yield. Sampling bias, within-batch variation and measurement uncertainty are not automatically included. Calculate different analytes separately.
Dry mass = received mass × (1 − moisture/100); constituent mass = dry mass × dry-basis assay/100; weighted dry-basis assay = total constituent mass ÷ total dry mass × 100.
Manufacturing capacity in China
Assess Chinese manufacturers through separate evidence for raw-material origin, extraction, batch quality control and deliverable capacity. Turn the findings into an actionable purchase specification.
Cultivation and traceability
Check evidence for owned, leased or partner bases, origin, harvest season, lot identifiers, drying and storage. Confirm cultivated area separately from the quantity available for this order.
Extraction and standardization
Identify the site, raw-material throughput, solvents, concentration and drying, carriers or excipients, and assay definition. Establish ginkgo scheduling availability on shared lines.
Testing and batch release
Review representative sampling, identity, methods and standards, assay and applicable impurities, matching COAs and release records. Confirm the laboratory scope covers commissioned tests.
Five different measures of scale
- Annual design capacity
- State the year, site, product and unit; distinguish raw-material throughput from finished extract output.
- Actual annual output
- The quantity of that product made in the stated period; revenue and whole-factory capacity are different measures.
- Manufacturing batch size
- Defines sampling, homogeneity and traceability. One purchase lot may contain several manufacturing batches.
- Minimum order quantity (MOQ)
- A commercial threshold by specification and pack size, distinct from the smallest production batch.
- Available schedule and delivery
- Confirm this order against stock, committed orders, production time and quality-release lead time.
International standards alignment
Set the destination and intended use before mapping Chinese batch records to applicable requirements. Unit conversion resolves presentation differences; standards alignment also needs evidence.
Fix material and edition
Distinguish leaf, refined quantified extract and finished product. Specify the standard, edition, supplements and contractual scope.
Map analytical methods
Retain Simplified Chinese assay terms with translations. Check constituents, hydrolysis and calculation factors, reference standards, reporting basis, moisture and loss on drying.
Assemble batch evidence
Prepare matching COAs, method identifiers, chromatographic or identity evidence and applicable solvent, pesticide, elemental-impurity and microbiological results. Select tests for the destination and intended use.
Agree acceptance and delivery
Have the buyer and laboratory assess differences and additional tests. Define acceptance, retesting, retained samples, change notification, transport and storage.
USP: full definition and method
The 2019 public definition specifies dry basis and lactone subgroups for powdered extract. A “24/6” label alone cannot establish that definition. [3]
EU: preparation and process
The EMA monograph distinguishes powdered leaf from refined quantified dry extract. Check preparation, extraction solvent and applicable pharmacopoeial requirements. [22]
Canada: ingredient versus finished product
The 2025 natural-health-product monograph applies the 5 ppm ginkgolic-acid restriction to finished products, not directly to raw ginkgo leaf. [13]
A useful handoff comprises an analyte comparison table, corresponding batch evidence and an open-differences list. Numerical reference ranges do not constitute certification.
Regional standards
The Chinese Pharmacopoeia is a central reference for medicinal quality requirements in China. Current-edition information, public historical references and other standards are identified separately below.
This page covers major systems for which public evidence has been found; it is not an exhaustive global register. Consult the current authorized text, effective dates and supplements applicable to your destination market.
| Standard / region / Edition and evidence | Verified reference parameters | Scope notes |
|---|---|---|
| Chinese Pharmacopoeia · Ginkgo leaf extractChina · Ginkgo leaf extract2025 edition[1] | No verified corresponding parameterReporting basis: Not specified | The 2025 edition took effect on 1 October 2025, and its official contents list Ginkgo leaf extract. The complete current monograph, numerical criteria and assay methods remain to be verified. Check the contract edition and method; automatic parameter comparison is unavailable. Current authorized text requires review |
| Ginkgo leaf extract for health foodsChina · Ginkgo leaf extractT/CNHFA 001-2019; effective 1 February 2020[2] |
| This association standard was issued by the China Nutrition and Health Food Association for extracts used in health foods. The cited edition specifies minimum glycosides of 24%, minimum terpene lactones of 6% and maximum ginkgolic acids of 3 mg/kg, quantified against C17:1. It is distinct from the Chinese Pharmacopoeia. Verify the method and calculation basis. Current authorized text requires review |
| USP-NF · Powdered Ginkgo ExtractUnited States · Ginkgo leaf extractOfficial public definition, 2019[3] |
| The listed assays are calculated on the dried basis in USP's official 2019 public definition. The complete current monograph remains to be verified. These parameters alone do not establish compliance with USP. Current authorized text requires review |
| Refined and quantified Ginkgo dry extract · JRC referenceEuropean Union · Ginkgo leaf extractEuropean Commission JRC report; 21 August 2018[10] [8] [11] |
| The values come from a public European Commission JRC report referring to Ginkgo extract standards. This is not the complete current European Pharmacopoeia text. Compare ginkgolides A + B + C and bilobalide separately. This source describes ginkgolic acids as below 5 mg/kg. Current authorized text requires review |
| Ginkgo natural health product monographCanada · Ginkgo leaf extractHealth Canada; 25 July 2025[13] |
| This monograph guides natural health product licensing and labels and lists constituent ranges for a standardized dry extract. Its 5 ppm limit for ginkgolic acids applies to the finished product; it is not a limit for raw leaf or extract ingredients. Public reference information |
| USP-NF · Ginkgo leafUnited States · Ginkgo leaf materialOfficial public definition, 2017[4] |
| Leaf assays are on the dried basis and must be compared with leaf data, not extract data. Batch estimates require representative sampling of that batch and a consistent assay basis. The complete current monograph remains to be verified. Current authorized text requires review |
| Ginkgo leaf extract for health functional foodsSouth Korea · Ginkgo leaf extractMFDS historical amendment, 2013[14] |
| The official historical notice lists flavonol glycosides at 240–300 mg/g, equivalent to 24–30%. The current consolidated code, assay method and calculation basis remain to be verified. Automatic parameter comparison is unavailable. Current authorized text requires review |
Regional standards — Current authorized text requires review
- United Kingdom: BP 2026 includes European Pharmacopoeia texts. The complete current Ginkgo monographs remain to be verified. [12]
- India: Historical Indian Pharmacopoeia Commission documents confirm leaf, dry extract and tablet monographs. Their current numerical criteria in IP 2026 remain to be verified. [16] [17]
- Japan: The current JP 19 edition is confirmed. A relevant Ginkgo leaf or extract monograph has not been verified; a 24%/6% standard must not be assumed. [18]
- Korean Pharmacopoeia: The historical KP X leaf monograph is publicly available. Current extract monographs and the consolidated edition remain to be verified. [15]
- Brazil: ANVISA provides an unofficial translation of the EMA Ginkgo leaf monograph that refers to the European Pharmacopoeia. The translation does not establish an independent Brazilian quality standard. [19]
- China · forestry industry: The official register lists LY/T 1699-2023 as a current recommended industry standard. Its complete numerical text remains to be verified. [20]
- Australia, New Zealand, Switzerland, other European countries, Hong Kong (China), Taiwan (China), Southeast Asia and other regions: Verification of all current applicable standards in these regions is incomplete. Add requirements by destination, product category, the pharmacopoeia specified in the contract and local rules. Unverified does not mean that no standards exist.
Testing and sourcing in China
Check the assay in China before arranging bulk procurement
Contact us to arrange ginkgo leaf assay testing in China and discuss a more competitive total sourcing price based on origin, specification and volume.
Define the target
Confirm leaf or extract, destination market, assay targets and reporting basis.
Agree the sampling plan
Arrange sampling, composites and retained samples by lot, bag count and homogeneity, maintaining sample-to-lot traceability.
Arrange testing in China
Coordinate testing against agreed methods. If a CMA/CNAS report is required, check the laboratory and the actual scope covering that test first.
Review the report and estimate batches
Combine the corresponding assay and mass data to estimate constituent mass, checking moisture and atypical results.
Confirm quotation and delivery
Develop a sourcing proposal based on assay, volume, taxes, freight, packaging and delivery terms.
Agree tests, sample quantity, fees, lead time and report use before commissioning. This page is not a test report and does not guarantee untested assays or the lowest price across the market.
Compare assay and total cost in one sourcing brief
Tell us your volume, target assay, preferred origin and destination so we can discuss raw-material quotations and testing in China.
Only calculated, unchanged user entries are included. Example rows are always excluded.
Free consultation · factory sourcingView raw-material price observationsPrepare a sourcing evidence checklist →
Continue to the inquiry form with these details, add your contact information and submit. Nothing is sent by this button.
Chinese assay terminology
Chinese assay names always remain in Simplified Chinese, accompanied by a translation and explanation. Original standard titles retain the issuing body’s wording.
- 总黄酮醇苷Total flavonol glycosides
- Assay expressed by the method specified in the selected standard. Acid-hydrolysis and direct measurement of native compounds are not automatically equivalent.
- 萜类内酯Terpene lactones
- Check which constituents are included. Total and subgroup limits differ between standards.
- 银杏内酯A、B、CGinkgolides A, B and C
- Sum of three specified ginkgolides; not the entire terpene lactone total including bilobalide.
- 白果内酯Bilobalide
- A specified constituent reported separately from the ginkgolide group; check its individual limit.
- 总银杏酸Total ginkgolic acids
- A restricted impurity target, not a desired active constituent. Check method, homologues included and reference compound.
- 水分Moisture
- Water in the corresponding sample; dry-basis estimates require consistent sampling and reporting definitions.
- 干燥失重Loss on drying
- Mass lost under specified drying conditions may include volatiles other than water, so it cannot simply replace moisture.
Sources and editions
Open the sources to check definitions, editions and scope. Public summaries do not replace the current complete pharmacopoeia.
- NMPA/NHC announcement No.29 of 2025 and ChP2025 contents, official copy hosted by Hong Kong Trade and Industry Department · 2025
- T/CNHFA 001-2019 保健食品用银杏叶提取物, issuing association official PDF · T/CNHFA 001-2019
- USP-NF Powdered Ginkgo Extract, official DOI definition · 2019 public DOI snapshot
- USP-NF Ginkgo, official DOI definition · 2017 public DOI snapshot
- USP Dietary supplements quality analysis tools, official USP-hosted paper · 2016
- USP Powdered Ginkgo Extract Revision Bulletin · Historical 2011 revision bulletin
- USP Ginkgo Capsules Revision Bulletin · Historical 2011 capsule monograph
- EMA final assessment report on Ginkgo biloba L., folium · EMA/HMPC/321095/2012, adopted2015
- EMA Ginkgo folium official monograph register · Current register checked2026-09-07
- European Commission JRC/EURL evaluation report Ginkgo biloba extract · Ref.Ares(2018)4317669,2018-08-21
- EDQM Ph.Eur. Issue12.3 available · Ph.Eur.12.3
- British Pharmacopoeia2026 official publication page · BP2026
- Health Canada Ginkgo - Ginkgo biloba monograph · 2025-07-25
- MFDS amendment of Health Functional Food Code clarifying Ginkgo leaf extract · Historical2013 amendment
- MFDS Korean PharmacopoeiaX,MonographsPartII · KP X historical
- IPC AnnualReport2015–16 · 2015–16
- Indian Pharmacopoeia2026 official publication register · IP2026
- PMDA JapanesePharmacopoeia FAQ · JP19
- ANVISA Ginkgo biloba leaf EMA monograph translation · Translation of2015EMAmonograph
- SAMR official registry LY/T1699-2023银杏叶提取物 · LY/T1699-2023
- NIFDC2015银杏叶提取物及制剂专项研究 · November2015 technicalpresentation
- EMA European Union herbal monograph on Ginkgo biloba L., folium, preparation definitions on page 2 · 2015 monograph; reviewed 2026-09-07
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