Elemental Precision

From aluminum to zinc, or gold to palladium, our ISO 17025 accredited laboratory can analyze any element accurately and timely.
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Expert Analysis Since 1880

From Fortune 500 companies to family-owned businesses, Ledoux & Co. is the trusted partner for metallurgical analysis. Our expertise spans fire assay, wet chemistry, and instrumental analysis, built on a legacy of accuracy and reliability. With cutting-edge technology and a dedicated team, we’ve earned the confidence of industries worldwide.
Precious Metals

Precious Metals

Gold, silver, or any other rare earth metals, we have the experience to test your precious metals accurately. Depending upon your material, we can test for precious metals, i.e., fire assay, gravimetric, ICP or diluted separations.

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Spent Automotive Catalyst

Catalyst Analysis

Whether it's Spent, Fresh, EO, VAM or Petrochemical Catalyst, we can test all. With more than 45+ years of accurate PGM analysis for worldwide customers, delivering reliable results for precious metal recovery & recycling.

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On-Site Precious Metals Representation

On-Site Precious Metals Representation

With on-site witnessing at all times at the processing facilities, we are your "eyes and ears" for your material. We thoroughly document all data and and treat your material like our own.

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Accredited and Certified Testing Methods

Accredited and Certified Testing Methods

Our laboratory consistently demonstrates technical competence when analyzing catalysts, e-scrap, and gold alloys. Thus, assuring precise results, and your peace of mind.

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Our Values

At Ledoux & Co., ethical excellence is our foundation. We conduct business with integrity, striving for quality and impartiality. Our reputation is built on precision, respect, and trust. We reject illegal or unethical behavior, upholding personal integrity and scientific principles. Our commitment includes data security, equal opportunities, and environmental responsibility.
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Precision You Can Trust

Reliable Documentation

We document, review, and repeatedly meet the high standards necessary to maintain our ISO 17025 accreditation.

Customer Focused

We treat clients like family, appreciating their trust in us for precious and base metals material analysis.

Expert Materials Analysis

We accurately test and report on all precious and base metals for content and purity.

Trusted Assay Results

Our assay results are commercial grade and used for umpires, control purposes, and financial exchanges.

Mitigate Risk

Discover how our on-site weighing and sampling experts can help you minimize risk, ensure peace of mind, and drive business success.

Benefits of Independence

Family-owned and driven by accuracy, we deliver precise results based on scientific truth. We’re committed to remaining unbiased, objective, and unaffected by external influences.

Ledoux & Company analyzed the copper used on the Statue of Liberty and the metals used atop the Chrysler Building in New York City. It’s rumored that the company also assayed or tested the cables used on the Brooklyn Bridge.
Statue of Liberty
Metal from the lunar vehicle and moon rocks from the 1969 moon landing were entrusted to Ledoux & Company for analysis.
Moon landing
In 1896 an ad in Harper’s magazine advertised that Ledoux & Company (then known as Chemical Laboratory) declared that Rae’s Olive Oil from Italy was not adulterated by admixture with any other oil.
Ledoux & Company was involved in a small way with the top-secret Manhattan Project by monitoring for radioactive elements the water in the Hudson River after the first nuclear submarine docked there.
The company was called upon to analyze coins from the Atocha, a Spanish galleon ship sunk off the coast of Florida in the 1600’s. It’s also helped authenticate pre-Columbian artifacts.
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