Consistent specifications matter particularly in humic products, where raw material origin, extraction conditions and testing methods can influence reported results.
Our quality process
Our quality process includes raw-material evaluation, specification confirmation, finished-product testing and packaging inspection, according to the requirements of each product and order.
Parameters we report
Depending on the grade, important quality parameters may include:
- Humic acid or fulvic acid content
- Test method and reporting basis
- Water solubility and insoluble matter
- pH and moisture content
- Potassium, sodium or other relevant mineral content
- Ash content
- Particle size or granule characteristics
- Heavy metals and other market-specific requirements
Test methods stated in our Technical Data Sheets
Our current Technical Data Sheets (TDS v1.0) state the test method for each parameter. The methods used most often are:
| Parameter | Test method |
|---|---|
| Humic acid (dry basis) | HG/T 3278-2011 |
| Fulvic acid (dry basis) | HG/T 5334-2018 |
| Potassium as K₂O (dry basis) | GB/T 33804-2017 |
| pH (1:100) | GB/T 33804-2017 or HG/T 3278-2011, as stated in each TDS |
| Water solubility (dry basis) | HG/T 3278-2018 or HG/T 3278-2011, as stated in each TDS |
| Moisture | GB/T 8576 or HG/T 3278, as stated in each TDS |
| Appearance, flake and particle size | Visual |
| Fineness | Sieve method or NY/T 3034, as stated in each TDS |
Because humic substance measurements can vary between analytical methods, buyers comparing products from different suppliers should confirm that the results are reported on a comparable basis. For custom specifications, the agreed test method and acceptance criteria should be established before production.
Documents
- Technical Data Sheet (TDS) for each grade
- Safety Data Sheet (SDS)
- Certificate of Analysis (COA) issued with each shipment
- Batch identification
- Third-party testing requirements can be discussed for each order
Values in a TDS are typical values, not a specification. Batch results are stated on the Certificate of Analysis issued with each shipment.
Send us a reference COA or your target specification, and we will review it with you. Contact us
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