Ask what the percentage measures
Confirm whether the supplied figure is active polymer, total solids or another analytical result. Retain the method and product code. Do not silently substitute solids content for active fraction merely because the values look convenient.
Where a suitable active mass fraction is documented, active mass equals commercial-product mass multiplied by that fraction. Dividing commercial price per kilogram by the fraction gives price per active kilogram on that stated basis. Keep units and the evidence for the fraction visible.
Do not invent missing conversion data
For an illustrative price of 2 currency units per commercial kilogram and a confirmed fraction of 0.5, the normalized price is 4 units per active kilogram. These inputs are arithmetic examples, not a quoted price or a specification for Xinqi material.
Liquid volume-to-mass conversion may also require documented density. If the necessary basis is unavailable, compare measured commercial-product consumption explicitly instead of guessing. Mark the unresolved analytical issue in the quotation review.
Keep performance in the decision
Equal active mass does not establish equivalent separation behavior. Different grades may require different consumption or preparation to reach the same acceptable result. Compare only runs meeting the agreed liquid, solids and operating requirements.
Use the supplier quotation comparison to keep delivered scope and preparation differences visible. Request clarification before treating a normalized value as a binding purchase specification. A lower active-kilogram price cannot rescue a candidate that fails the required process endpoint.
Keep these purchase records
| Decision | Evidence to retain |
|---|---|
| Definition | Documented active fraction and method belong to the proposed product code. |
| Arithmetic | Mass, volume and currency conversions use compatible units without assumed density. |
| Decision | Normalized price remains subordinate to accepted performance and practical preparation. |