Independent Metallurgical Laboratory Since 1880
ISO 17025 accredited
assays your settlement
can stand on
ISO 17025 accredited
Testing competence
ISO 9001:2015 certified
Quality management
NIST traceable
Reference materials
144+ Years
Continuous scientific practice
Family Owned
No parent company, no affiliations
Commercial Grade
Umpire, control, and settlement
Fortune 500
To Family Run
Worldwide client base
How it works
Submit your sample
Complete the submission form and ship the lot, or ask our team to weigh and sample on site before material moves.
Submit a sampleWe prepare and analyze
Material is homogenized and split, then run by fire assay, wet chemistry, or instrumental analysis: the method matched to the material.
See our methodsYou receive certified results
Results are reported against NIST traceable standards with the uncertainty values appropriate to each method, ready for settlement or audit.
Review our documentationServices
Catalyst Testing
ISO 17025 accredited analysis of fresh and spent automotive catalysts for platinum, palladium, and rhodium content.
Catalyst Testing
ISO 17025 accredited analysis of fresh and spent automotive catalysts for platinum, palladium, and rhodium content.
Electronic Scrap Analysis
Precious and base metal recovery analysis from printed circuit boards, connectors, and mixed electronic waste.
On Site Representation
Weighing and sampling performed by Ledoux experts at your location or the counterparty site.
Precious Metals Analysis
High grade testing of gold, silver, platinum, palladium, and rhodium across bullion, scrap, and plated materials.
Rare Earth Elements Analysis
Analysis of rare earth elements in ores, alloys, magnets, and processed materials by instrumental methods.
Independent Metallurgical Laboratory Since 1880
Neutral by structure,
not by promise
ISO 17025 accredited laboratory for testing competence, including our auto catalyst analysis.
ISO 9001:2015 certified quality management, covering sample intake through final report.
Measurements traceable to NIST reference materials, with documented quality control.
What clients rely on us for
Accuracy
Placeholder: a client statement on results that held up against their refiner's own assay.
Turnaround
Placeholder: a client statement on reporting that met a settlement deadline.
Trust
Placeholder: a client statement on handing over high value material with confidence.
Understanding Iridium Catalyst: Applications, Testing, and Value
Where iridium shows up, how it is assayed, and what drives its recovered value.
Read MoreWhat Is Iridium Used For in Modern Industries?
The platinum group metal behind extreme temperature manufacturing and clean energy.
Read MoreInside the Industry: How Copper is Manufactured
From low grade ore to high purity cathode, and where assay accuracy decides value.
Read MoreSample Preparation Guide
How to collect increments, composite a lot, and ship material so the result represents what you actually have.
Download the Guide