Per-piece purchasing and assay-based purchasing use different approaches to evaluating catalytic converter material. Per-piece discussions focus on identified units and the quoted terms. An assay-based discussion involves analysis of a material lot and how the results connect to the agreed settlement.
Updated October 22, 2026.
What is per-piece or code-based purchasing?
In a per-piece transaction, the buyer evaluates identified converters and discusses a price for the units under consideration. Code-based information can support identification and valuation, but the seller should confirm the actual unit, its condition, and the basis of the quote.
Maxcore describes per-can purchasing, code-based evaluation, and ship-in or on-site options on its catalytic converter page. Contact the team to discuss the route appropriate to your inventory.
What is assay-based purchasing?
An assay measures the precious-metal content of a prepared sample. In a batch transaction, the sampling process and the connection between the sample and the lot are important. The analysis is then considered alongside the agreed purchasing and settlement terms.
For an introduction, read what an assay measures. For reporting questions, see how to read an assay report.
Questions to compare the two approaches
| Question | Per-piece discussion | Assay discussion |
|---|---|---|
| What is being evaluated? | The identified converters in the quote | The material lot represented by the analysis |
| What records matter? | Unit identification, counts, condition, and quote details | Lot identification, sampling records, analysis, and settlement details |
| How is pricing explained? | Ask how the quoted unit values and terms apply | Ask how measured content and agreed terms connect to payment |
| When are payment and delivery arranged? | Confirm directly with the buyer | Confirm directly with the buyer |
Which approach fits my material?
Discuss your inventory rather than assuming one method is always better. Explain the type and quantity of converters, identification information, material condition, location, and your preferred transaction process. Ask the buyer to explain the available options in terms you can compare.
A higher headline figure does not explain every part of a transaction. Confirm the material basis, applicable charges or deductions, pricing date, and payment terms before comparing offers. Neither purchasing method guarantees the highest return for every inventory.
What should I ask before agreeing to a transaction?
- How will the converters or material lot be identified?
- What condition or material differences could affect the quote?
- Which pricing reference and date apply?
- What charges or deductions are included in the agreed terms?
- What are the delivery, reporting, and payment arrangements?
- How are questions about identification, analysis, or settlement handled?
Discuss your converter inventory with Maxcore
Request a converter purchasing conversation or call 314-725-2673. For broader market context, visit Precious Metals Pricing; a market reference is not a quote for your material.
Industry context: Refined Catalyst Services describes assay and per-piece programs, while BASF ECMS describes sampling, assay, and settlement options. These references explain industry approaches; confirm Maxcore's terms directly.