Humic Acid Percentage Test – Dry Solids (Fertilizers, Compost, Humates & More) (TPSL Method)
Quantify the True Humic Value of Any Dry Organic Input
This test provides a precise, lab-verified measurement of humic acid (HA) content in any dry solid material —including powdered fertilizers, composts, soil amendments, dry humates, and leonardite-based products. Whether you're validating a new product, ensuring consistency across batches, or substantiating a nutrient claim, this test gives you the data you need to make informed decisions.
What This Test Measures:
- % Humic Acid (HA) using a standardized industry method for solids
- Applicable to fertilizers, composts, powdered organic inputs, dry humates, leonardite, lignite-based products, and more
- pH is not included in this test
Sample Submission:
- Minimum Sample Size: 1 cup (dry, finely ground material preferred)
- Packaging: Sealed and clearly labeled container or bag
- Turnaround Time: 5–7 business days from lab receipt
Ideal For:
- Fertilizer manufacturers and blenders verifying humic content
- Compost producers assessing humification levels
- Leonardite processors comparing raw material quality
- Soil amendment developers evaluating organic matter value
- Organic certification support for input materials
- Distributors and buyers validating product specifications
Why This Test Matters:
- Verify potency of dry organic inputs with third-party lab data
- Compare materials across different batches, sources, or suppliers
- Ensure label accuracy and support compliance in product registration
- Optimize formulations by understanding true humic contribution
- Differentiate your product in a crowded organic input marketplace
Go Beyond the Guesswork
Humic acid content can vary dramatically—even within the same source material. This test removes the uncertainty, offering clarity and confidence for manufacturers, buyers, and growers alike.
Order the Humic Acid Percentage Test Today
Measure what matters. Know the real humic content in your fertilizers, composts, and dry inputs to ensure consistency, quality, and credibility.
Frequently Asked Questions
- What are your business hours?
Our office is open Monday thru Friday from 8 am to 5 pm. We do close for major holidays, so we recommend ordering your testing and sending your sample early if a holiday is coming up. You can always reach us by email. Just send us a message at info@tpslab.com
- When will I get my results?
We understand that you need your results as soon as possible. That is why we make sure to begin processing your samples as soon as they arrive at our laboratory. When the results are ready, we will email them to the email address you provided on your submittal form. The list below will give you an idea of our usual turnaround times.
Soil Tests: 5-7 Business days
Water Tests: 5 - 7 Business days
Plants Tests: 24 - 48 Hours
Compost Tests: 7 - 14 Business days
Fertilizer Tests: 3 - 5 Business days
Heavy Metals Test: 7 - 14 Business days
We offer a rush option for an additional 50% of the testing cost, but we would encourage you to give yourself time to test before you get to a point where a rush is needed.
